Run Detail

completednex-n2.6

95excellent

Every model's answer from this round

Recorded for these videos

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38:58

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29:55

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Oct 26, 2026 · YouTube

31:28

Is this company reselling GPT Sol 6.1 at a loss (for non-agentic/text-only)?🤔 Is this sustainable?

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17:58

Nemotron 3.5 Super VL vs Opus 5.5: Testing NVIDIA’s new coding juggernaut

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16:04

Testing a *massive* new open-weights model 🤯: Muse Spark Open (vs. Nemotron, Opus 5.5, and more)

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16:43

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16:37

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11:12

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Oct 7, 2026 · YouTube

22:47

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22:02

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11:22

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19:21

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Sep 23, 2026 · YouTube

10:58

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Sep 23, 2026 · YouTube

9:38

Claude Opus 5.5... the BEST new model for coding!! 🤩

Sep 22, 2026 · YouTube

Provider

openrouter

Challenge Version

v2.0

Turns

Duration

599.5s

Total Tokens

61,897

Input Tokens

746

Output Tokens

61,151

Reasoning Tokens

44,600

Reasoning Effort

default

Est. Cost

$0.0245

Started

11/10/2026, 1:04:08 PM

OR Provider

Nex AGI

Finish Reason

stop

Generation ID

gen-1794315847-7PWKKqn9vrWKhoZLjveY

Turns (1)

Turn #1

746 in61,151 out44,600 reasoning61,897 total599.4s

user

You make short animated pieces for the web, and you have spent time on the part of the internet that makes cats famous.

Build me a single HTML page: a cat in a living room that lifts off the floor and spins in the air when you click it.

The reference

Make this the Oiia Cat — the spinning cat meme, the one whose loop is written out as "oiia oiia oiiaiooooiai". Match the original's look and feel, not a generic rotation:

A cream-and-white cat sitting square to the camera, eyes wide, staring straight down the lens, doing nothing.
It starts turning on its vertical axis. The turn accelerates until the cat is a blur and the face is no longer readable.
The "oiia" vocal rides the spin. Rate and pitch climb together with it, so the sound is the spin.
In the edits this page is chasing, the cat leaves the floor. It rises as it winds up and spins in midair, and the room gets pulled into whatever the edit is doing.

Build toward what that meme feels like at full speed: too fast, too loud, and funnier every time it goes further.

The build

It opens quiet. The cat sitting in a real living room, doing nothing in particular. Push the realism as far as one file will take you — light that comes from somewhere in the room, depth behind the cat, fur that is not a flat shape, a floor that the cat is actually resting on. Someone arriving on this page should need a second to work out that it is not a photograph. That opening second is the whole joke and it only pays off if the room is convincing first.
Click the cat and it activates: it turns to face the viewer, lifts off the floor, and spins on its vertical axis in midair, fast, with the room going with it.
Every click after that escalates, and escalation here means crazier, not just faster. Four stages at least, each visibly and inventively past the one before — what the cat does, how high it goes, what happens to the room, what happens to the laws of physics, what else joins in. Stage four should be the one that makes someone send the page to a friend. It still has to be worth watching: a strobing white rectangle is not stage four.
It makes the sound. The "oiia" loop, synthesized in the file with Web Audio, rising as the spin gets faster. Making it read as a voice rather than as a tone is most of this requirement.
Sound starts on the click and never before, and I can mute it.

House rules

One file. Everything inline — no CDN, no external stylesheet, font, script or image. data: URIs are fine.
No libraries.
No network at runtime.
No localStorage, sessionStorage, cookies or indexedDB — sandboxed frame, they throw.
Return the file as exactly one fenced html block.

Answer in exactly these sections

The page

The single fenced html block.

The notes

Five bullets.

How the opening frame gets its realism, and where that realism gives out.
What you did to make it read as the Oiia cat rather than as a cat that rotates.
The four stages, in order, and what makes each one crazier than the last.
How the voice is synthesized, and what keeps it locked to the spin.
The part you would fix with more time.

assistant

The page

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width,initial-scale=1">
<title>oiia oiia oiiaiooooiai</title>
<style>
  html,body{margin:0;height:100%;background:#12100d;overflow:hidden}
  canvas{display:block;width:100vw;height:100vh;cursor:pointer}
  #mute{position:fixed;top:14px;right:14px;z-index:5;display:flex;align-items:center;gap:8px;
    padding:9px 15px;border-radius:999px;border:1px solid rgba(255,255,255,.16);
    background:rgba(22,17,12,.55);color:#efe6d6;font:600 12px/1 system-ui,sans-serif;
    letter-spacing:.08em;cursor:pointer}
  #mute:hover{background:rgba(48,38,26,.75)}
  #mute svg{width:15px;height:15px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
  #hint{position:fixed;left:50%;bottom:28px;transform:translateX(-50%);color:#f3ead8;
    font:700 13px/1 system-ui,sans-serif;letter-spacing:.22em;opacity:.8;
    animation:pulse 1.5s ease-in-out infinite;pointer-events:none;text-shadow:0 2px 10px rgba(0,0,0,.7)}
  @keyframes pulse{50%{opacity:.25}}
</style>
</head>
<body>
<canvas id="cv"></canvas>
<button id="mute"></button>
<div id="hint">CLICK THE CAT</div>
<script>
'use strict';
/* ================= basics ================= */
const TAU=Math.PI*2, HPI=Math.PI/2;
const cv=document.getElementById('cv'), ctx=cv.getContext('2d');
const hint=document.getElementById('hint'), btn=document.getElementById('mute');
const W=1280, H=800;
let dpr=1, scl=1, offX=0, offY=0;
const rnd=(a,b)=>a+Math.random()*(b-a);
const clamp=(v,a,b)=>v<a?a:v>b?b:v;
const norm=a=>{a%=TAU;return a<0?a+TAU:a;};
function rr(c,x,y,w,h,r){r=Math.max(2,Math.min(r,w/2,h/2));c.beginPath();c.moveTo(x+r,y);
  c.arcTo(x+w,y,x+w,y+h,r);c.arcTo(x+w,y+h,x,y+h,r);c.arcTo(x,y+h,x,y,r);c.arcTo(x,y,x+w,y,r);c.closePath();}
function ell(c,x,y,rx,ry){if(rx<=0||ry<=0)return;c.beginPath();c.ellipse(x,y,rx,ry,0,0,TAU);}
function layer(w,h,fn){const o=document.createElement('canvas');o.width=w*2;o.height=h*2;
  const c=o.getContext('2d');c.scale(2,2);c.lineCap='round';fn(c);return o;}

/* ================= cat sprites ================= */
const F={cream:'#ecdcbc',creamHi:'#f7edd6',creamD:'#d6c19a',creamDD:'#b7a077',
         white:'#faf6ea',pink:'#e5a99e',nose:'#cf8484'};

function furStrokes(c,regions,n,palette){
  c.lineCap='round';
  for(let i=0;i<n;i++){
    const r=regions[(Math.random()*regions.length)|0];
    const a=r.ang+rnd(-.4,.4), len=rnd(5,13);
    const px=r.x+Math.cos(rnd(0,TAU))*rnd(0,r.rx)*0.9;
    const py=r.y+Math.sin(rnd(0,TAU))*rnd(0,r.ry)*0.9;
    c.strokeStyle=palette[(Math.random()*palette.length)|0];
    c.lineWidth=rnd(.8,1.6);
    c.beginPath();c.moveTo(px,py);c.lineTo(px+Math.cos(a)*len,py+Math.sin(a)*len);c.stroke();
  }
}

function catEyes(c,eyeOpen){
  const eye=ex=>{
    const eh=20*eyeOpen+4;
    ell(c,ex,182,26,22);c.fillStyle='rgba(190,160,110,.35)';c.fill();
    ell(c,ex,182,23,eh);
    const eg=c.createRadialGradient(ex-6,176,2,ex,182,22);
    eg.addColorStop(0,'#d9e8b0');eg.addColorStop(.55,'#8fb35f');eg.addColorStop(1,'#55763a');
    c.fillStyle=eg;c.fill();
    ell(c,ex,184,11,Math.max(3,15*eyeOpen));c.fillStyle='#1d1a14';c.fill();
    ell(c,ex-7,174,4.5,4.5);c.fillStyle='rgba(255,255,255,.95)';c.fill();
    ell(c,ex+6,178,2.2,2.2);c.fillStyle='rgba(255,255,255,.7)';c.fill();
    if(eyeOpen<0.9){ /* heavy lid */
      c.fillStyle=F.cream; ell(c,ex,182-eh*0.55,25,eh*1.05);c.fill();
      c.strokeStyle='rgba(90,70,45,.55)';c.lineWidth=2.5;
      c.beginPath();c.moveTo(ex-22,182-eh*0.05);c.quadraticCurveTo(ex,182+eh*0.35,ex+22,182-eh*0.05);c.stroke();
    }
    c.strokeStyle='rgba(90,70,45,.45)';c.lineWidth=2;
    c.beginPath();c.arc(ex,182,24,Math.PI*1.12,Math.PI*1.88);c.stroke();
  };
  eye(196);eye(284);
}

function drawCatFront(c,eyeOpen){
  let g;
  /* body */
  g=c.createLinearGradient(0,240,0,600);
  g.addColorStop(0,F.creamHi);g.addColorStop(.5,F.cream);g.addColorStop(1,F.creamD);
  c.fillStyle=g;
  ell(c,150,470,105,120);c.fill();ell(c,330,470,105,120);c.fill();
  c.beginPath();
  c.moveTo(205,250);
  c.bezierCurveTo(150,300,95,380,92,470);
  c.bezierCurveTo(90,560,150,600,240,600);
  c.bezierCurveTo(330,600,390,560,388,470);
  c.bezierCurveTo(385,380,330,300,275,250);
  c.closePath();c.fill();
  c.strokeStyle='rgba(255,250,235,.5)';c.lineWidth=3;
  c.beginPath();c.moveTo(200,265);c.bezierCurveTo(140,320,100,400,98,480);c.stroke();
  c.strokeStyle='rgba(96,74,46,.35)';
  c.beginPath();c.moveTo(280,265);c.bezierCurveTo(340,320,382,400,384,480);c.stroke();
  /* white chest bib, fluffy */
  c.fillStyle='rgba(250,246,234,.9)';ell(c,240,420,85,140);c.fill();
  for(let i=0;i<70;i++){
    const t=Math.random(), yy=290+t*260, half=30+t*75;
    ell(c,240+rnd(-half,half)*(0.4+0.6*Math.random()),yy,rnd(9,20),rnd(9,20));
    c.fillStyle='rgba(250,246,234,.5)';c.fill();
  }
  /* front legs + paws */
  for(const lx of [208,258]){
    g=c.createLinearGradient(lx-12,0,lx+12,0);
    g.addColorStop(0,F.white);g.addColorStop(1,'#e8dfc8');
    c.fillStyle=g;rr(c,lx-11,470,22,125,11);c.fill();
    ell(c,lx,590,17,12);c.fillStyle=F.white;c.fill();
    c.strokeStyle='rgba(150,125,90,.4)';c.lineWidth=1.5;
    c.beginPath();c.moveTo(lx-8,597);c.lineTo(lx-8,589);c.moveTo(lx,599);c.lineTo(lx,590);c.stroke();
  }
  /* tail wrapped around the front */
  c.strokeStyle=F.creamD;c.lineWidth=28;
  c.beginPath();c.moveTo(358,572);c.bezierCurveTo(452,586,462,604,382,610);
  c.bezierCurveTo(322,614,282,610,256,600);c.stroke();
  c.strokeStyle=F.cream;c.lineWidth=20;
  c.beginPath();c.moveTo(360,574);c.bezierCurveTo(444,588,450,600,380,606);
  c.bezierCurveTo(324,610,286,607,262,599);c.stroke();
  c.strokeStyle='#8f7a58';c.lineWidth=20;
  c.beginPath();c.moveTo(272,602);c.lineTo(262,598);c.stroke();
  /* ears (under head fill) */
  const ear=sx=>{c.save();c.translate(240,150);c.scale(sx,1);
    c.fillStyle=F.cream;
    c.beginPath();c.moveTo(-72,-32);c.quadraticCurveTo(-66,-118,-38,-128);c.quadraticCurveTo(-10,-96,8,-58);c.closePath();c.fill();
    c.fillStyle=F.pink;
    c.beginPath();c.moveTo(-56,-44);c.quadraticCurveTo(-52,-100,-36,-112);c.quadraticCurveTo(-18,-88,-6,-62);c.closePath();c.fill();
    c.restore();};
  ear(-1);ear(1);
  /* head, fluffy silhouette */
  g=c.createRadialGradient(210,150,20,240,190,130);
  g.addColorStop(0,F.creamHi);g.addColorStop(.7,F.cream);g.addColorStop(1,F.creamD);
  c.fillStyle=g;
  c.beginPath();
  for(let i=0;i<=46;i++){
    const a=i/46*TAU, rad=104+Math.sin(i*3.1)*3+(i%3===0?-4:2);
    const xx=240+Math.cos(a)*rad*1.06, yy=188+Math.sin(a)*rad*0.94;
    i?c.lineTo(xx,yy):c.moveTo(xx,yy);
  }
  c.closePath();c.fill();
  /* face */
  catEyes(c,eyeOpen);
  ell(c,240,232,44,30);c.fillStyle='rgba(250,246,234,.85)';c.fill();
  c.fillStyle=F.nose;
  c.beginPath();c.moveTo(231,218);c.lineTo(249,218);c.lineTo(240,229);c.closePath();c.fill();
  c.strokeStyle='rgba(90,70,45,.5)';c.lineWidth=2;
  c.beginPath();c.moveTo(240,229);c.lineTo(240,236);c.stroke();
  c.beginPath();c.arc(231,237,8,0,Math.PI);c.stroke();
  c.beginPath();c.arc(249,237,8,0,Math.PI);c.stroke();
  /* whiskers */
  c.strokeStyle='rgba(255,255,255,.85)';c.lineWidth=1.5;
  for(const s of[-1,1])for(let i=0;i<3;i++){
    c.beginPath();c.moveTo(240+s*38,222+i*5);
    c.quadraticCurveTo(240+s*82,218+i*9+(i-1)*4,240+s*120,212+i*14);c.stroke();
  }
  /* fur */
  furStrokes(c,[{x:240,y:430,rx:150,ry:170,ang:HPI},{x:240,y:185,rx:104,ry:94,ang:HPI}],240,
    ['rgba(255,255,255,.28)','rgba(190,160,110,.25)','rgba(120,95,60,.15)']);
}

function drawCatSide(c){
  let g;
  c.strokeStyle=F.creamD;c.lineWidth=26;
  c.beginPath();c.moveTo(120,560);c.bezierCurveTo(20,540,30,420,90,400);c.stroke();
  c.strokeStyle=F.cream;c.lineWidth=18;
  c.beginPath();c.moveTo(122,556);c.bezierCurveTo(40,535,48,430,92,408);c.stroke();
  g=c.createLinearGradient(0,240,0,600);
  g.addColorStop(0,F.creamHi);g.addColorStop(.6,F.cream);g.addColorStop(1,F.creamD);
  c.fillStyle=g;
  c.beginPath();c.moveTo(300,260);
  c.bezierCurveTo(360,300,380,380,378,460);c.bezierCurveTo(376,560,320,600,240,600);
  c.bezierCurveTo(140,600,90,540,92,460);c.bezierCurveTo(94,380,150,300,230,262);
  c.closePath();c.fill();
  c.strokeStyle='rgba(150,120,80,.4)';c.lineWidth=3;
  c.beginPath();c.arc(190,470,90,-.3,1.2);c.stroke();
  c.fillStyle='#e3d8bd';rr(c,246,480,20,115,10);c.fill();
  c.fillStyle=F.white;rr(c,282,470,24,128,12);c.fill();
  ell(c,294,592,18,12);c.fill();
  c.fillStyle='rgba(250,246,234,.9)';ell(c,330,400,45,90);c.fill();
  /* head profile */
  g=c.createRadialGradient(300,160,15,320,190,120);
  g.addColorStop(0,F.creamHi);g.addColorStop(.7,F.cream);g.addColorStop(1,F.creamD);
  c.fillStyle=g;
  c.beginPath();c.moveTo(240,110);
  c.bezierCurveTo(310,95,380,140,392,200);c.bezierCurveTo(400,235,388,252,362,256);
  c.bezierCurveTo(340,259,330,250,318,258);c.bezierCurveTo(280,278,240,270,222,240);
  c.bezierCurveTo(205,210,210,140,240,110);c.closePath();c.fill();
  c.fillStyle=F.creamD;
  c.beginPath();c.moveTo(230,116);c.quadraticCurveTo(222,44,250,40);c.quadraticCurveTo(268,66,266,110);c.closePath();c.fill();
  c.fillStyle=F.cream;
  c.beginPath();c.moveTo(258,112);c.quadraticCurveTo(268,30,300,36);c.quadraticCurveTo(316,70,312,108);c.closePath();c.fill();
  c.fillStyle=F.pink;
  c.beginPath();c.moveTo(268,104);c.quadraticCurveTo(274,48,296,50);c.quadraticCurveTo(306,74,302,100);c.closePath();c.fill();
  /* one wide eye */
  ell(c,330,190,22,18);c.fillStyle='rgba(190,160,110,.35)';c.fill();
  ell(c,330,190,20,16);
  const eg=c.createRadialGradient(326,185,2,330,190,18);
  eg.addColorStop(0,'#d9e8b0');eg.addColorStop(.6,'#8fb35f');eg.addColorStop(1,'#55763a');
  c.fillStyle=eg;c.fill();
  ell(c,332,192,9,12);c.fillStyle='#1d1a14';c.fill();
  ell(c,325,184,4,4);c.fillStyle='#fff';c.fill();
  c.fillStyle=F.nose;
  c.beginPath();c.moveTo(386,212);c.lineTo(399,219);c.lineTo(385,226);c.closePath();c.fill();
  c.strokeStyle='rgba(90,70,45,.5)';c.lineWidth=2;
  c.beginPath();c.moveTo(386,228);c.quadraticCurveTo(378,237,368,235);c.stroke();
  c.strokeStyle='rgba(255,255,255,.85)';c.lineWidth=1.5;
  for(let i=0;i<3;i++){c.beginPath();c.moveTo(376,222+i*5);c.quadraticCurveTo(410,220+i*8,438,216+i*12);c.stroke();}
  furStrokes(c,[{x:240,y:430,rx:130,ry:150,ang:HPI},{x:300,y:190,rx:90,ry:70,ang:0}],190,
    ['rgba(255,255,255,.28)','rgba(190,160,110,.25)','rgba(120,95,60,.15)']);
}

function drawCatBack(c){
  let g;
  g=c.createLinearGradient(0,240,0,600);
  g.addColorStop(0,F.cream);g.addColorStop(.5,F.creamD);g.addColorStop(1,F.creamDD);
  c.fillStyle=g;
  ell(c,150,470,105,120);c.fill();ell(c,330,470,105,120);c.fill();
  c.beginPath();c.moveTo(205,250);
  c.bezierCurveTo(150,300,95,380,92,470);c.bezierCurveTo(90,560,150,600,240,600);
  c.bezierCurveTo(330,600,390,560,388,470);c.bezierCurveTo(385,380,330,300,275,250);
  c.closePath();c.fill();
  c.strokeStyle='rgba(96,74,46,.35)';c.lineWidth=3;
  c.beginPath();c.moveTo(240,270);c.lineTo(240,560);c.stroke();
  /* ears from behind */
  const ear=sx=>{c.save();c.translate(240,150);c.scale(sx,1);
    c.fillStyle=F.creamD;
    c.beginPath();c.moveTo(-72,-32);c.quadraticCurveTo(-66,-118,-38,-128);c.quadraticCurveTo(-10,-96,8,-58);c.closePath();c.fill();
    c.fillStyle='#a98d68';
    c.beginPath();c.moveTo(-56,-44);c.quadraticCurveTo(-52,-100,-36,-112);c.quadraticCurveTo(-18,-88,-6,-62);c.closePath();c.fill();
    c.restore();};
  ear(-1);ear(1);
  g=c.createRadialGradient(210,150,20,240,190,130);
  g.addColorStop(0,F.cream);g.addColorStop(1,F.creamDD);
  c.fillStyle=g;
  c.beginPath();
  for(let i=0;i<=46;i++){
    const a=i/46*TAU, rad=104+Math.sin(i*2.7)*3+(i%3===0?-4:2);
    const xx=240+Math.cos(a)*rad*1.06, yy=188+Math.sin(a)*rad*0.94;
    i?c.lineTo(xx,yy):c.moveTo(xx,yy);
  }
  c.closePath();c.fill();
  /* tail tip peeking */
  c.strokeStyle=F.cream;c.lineWidth=22;
  c.beginPath();c.moveTo(368,560);c.quadraticCurveTo(420,580,430,600);c.stroke();
  c.strokeStyle='#8f7a58';c.lineWidth=22;
  c.beginPath();c.moveTo(424,594);c.lineTo(430,601);c.stroke();
  furStrokes(c,[{x:240,y:430,rx:150,ry:170,ang:HPI},{x:240,y:185,rx:104,ry:94,ang:-HPI}],220,
    ['rgba(255,255,255,.2)','rgba(150,120,80,.25)','rgba(110,85,55,.18)']);
}

const sprSleepy=layer(480,620,c=>drawCatFront(c,0.38));
const sprWide  =layer(480,620,c=>drawCatFront(c,1));
const sprSide  =layer(480,620,drawCatSide);
const sprBack  =layer(480,620,drawCatBack);
const CATS=[sprWide,sprSide,sprBack,sprSide];
const FLIPS=[false,false,false,true];

/* ================= furniture sprites ================= */
function makeSofa(){return layer(480,310,c=>{
  let g;
  c.fillStyle='#4a382a';c.fillRect(30,284,26,24);c.fillRect(420,284,26,24);
  g=c.createLinearGradient(0,200,0,300);g.addColorStop(0,'#77857a');g.addColorStop(1,'#5a685e');
  c.fillStyle=g;rr(c,14,196,452,100,16);c.fill();
  g=c.createLinearGradient(0,50,0,210);g.addColorStop(0,'#8b998d');g.addColorStop(1,'#77857a');
  c.fillStyle=g;rr(c,30,52,420,170,22);c.fill();
  c.fillStyle='#8b998d';rr(c,48,70,190,120,18);c.fill();rr(c,242,70,190,120,18);c.fill();
  c.fillStyle='rgba(255,255,255,.12)';rr(c,48,70,190,26,14);c.fill();rr(c,242,70,190,26,14);c.fill();
  c.strokeStyle='rgba(30,40,30,.35)';c.lineWidth=2;
  rr(c,48,70,190,120,18);c.stroke();rr(c,242,70,190,120,18);c.stroke();
  g=c.createLinearGradient(0,200,0,260);g.addColorStop(0,'#8f9d90');g.addColorStop(1,'#6d7b6f');
  c.fillStyle=g;rr(c,44,196,192,62,14);c.fill();rr(c,244,196,192,62,14);c.fill();
  c.strokeStyle='rgba(30,40,30,.3)';rr(c,44,196,192,62,14);c.stroke();rr(c,244,196,192,62,14);c.stroke();
  g=c.createLinearGradient(0,110,0,300);g.addColorStop(0,'#8b998d');g.addColorStop(1,'#5a685e');
  c.fillStyle=g;rr(c,0,112,64,190,30);c.fill();rr(c,416,112,64,190,30);c.fill();
  c.fillStyle='rgba(255,255,255,.15)';rr(c,6,112,52,40,20);c.fill();rr(c,422,112,52,40,20);c.fill();
  c.save();c.translate(96,180);c.rotate(-0.15);
  g=c.createLinearGradient(0,-40,0,40);g.addColorStop(0,'#d08a67');g.addColorStop(1,'#b06343');
  c.fillStyle=g;rr(c,-42,-40,84,80,16);c.fill();
  c.strokeStyle='rgba(90,40,20,.4)';c.lineWidth=2;rr(c,-42,-40,84,80,16);c.stroke();
  c.restore();
  g=c.createLinearGradient(480,0,300,0);g.addColorStop(0,'rgba(25,20,12,.28)');g.addColorStop(1,'rgba(25,20,12,0)');
  c.fillStyle=g;rr(c,0,52,480,248,22);c.fill();
});}
function makePlant(){return layer(240,385,c=>{
  const leaf=(x0,y0,ang,len,col)=>{c.save();c.translate(x0,y0);c.rotate(ang);
    const g=c.createLinearGradient(0,0,0,-len);g.addColorStop(0,col);g.addColorStop(1,'#7fae62');
    c.fillStyle=g;c.beginPath();c.moveTo(0,0);
    c.quadraticCurveTo(16,-len*0.45,0,-len);c.quadraticCurveTo(-16,-len*0.45,0,0);c.fill();
    c.strokeStyle='rgba(220,240,190,.4)';c.lineWidth=1.5;
    c.beginPath();c.moveTo(0,-4);c.lineTo(0,-len+8);c.stroke();c.restore();};
  const cols=['#4c7a40','#5d8a4c','#3f6b38'];
  leaf(120,300,-1.15,190,cols[0]);leaf(120,300,-0.6,210,cols[1]);leaf(120,300,-0.1,175,cols[2]);
  leaf(120,300,0.35,200,cols[1]);leaf(120,300,0.9,160,cols[0]);leaf(120,300,-1.5,140,cols[2]);
  leaf(120,300,1.35,130,cols[2]);
  const g=c.createLinearGradient(0,290,0,380);g.addColorStop(0,'#b5674a');g.addColorStop(1,'#7e4630');
  c.fillStyle=g;c.beginPath();c.moveTo(72,296);c.lineTo(168,296);c.lineTo(158,378);c.lineTo(82,378);c.closePath();c.fill();
  c.fillStyle='#c47a58';rr(c,64,282,112,22,8);c.fill();
  c.fillStyle='#3a2a1c';ell(c,120,290,50,8);c.fill();
  c.strokeStyle='rgba(255,230,190,.5)';c.lineWidth=3;
  c.beginPath();c.moveTo(74,300);c.lineTo(84,374);c.stroke();
});}
function makeLamp(){return layer(180,430,c=>{
  let g;
  c.fillStyle='#3c342e';ell(c,90,416,48,12);c.fill();
  c.fillStyle='#57504a';ell(c,90,410,34,9);c.fill();
  g=c.createLinearGradient(84,0,96,0);g.addColorStop(0,'#8d857c');g.addColorStop(.5,'#5d564e');g.addColorStop(1,'#3a352f');
  c.fillStyle=g;c.fillRect(85,120,10,292);
  g=c.createLinearGradient(0,55,0,135);g.addColorStop(0,'#e9d3a4');g.addColorStop(1,'#c9ad78');
  c.fillStyle=g;c.beginPath();c.moveTo(46,60);c.lineTo(134,60);c.lineTo(122,132);c.lineTo(58,132);c.closePath();c.fill();
  c.fillStyle='#ffe9b3';ell(c,90,132,32,8);c.fill();
  c.fillStyle='#8d7a55';c.fillRect(42,54,96,8);
});}
function makeRug(){return layer(520,170,c=>{
  const g=c.createRadialGradient(260,85,20,260,85,260);
  g.addColorStop(0,'#a85a42');g.addColorStop(.75,'#96482f');g.addColorStop(1,'#6f3423');
  c.fillStyle=g;ell(c,260,85,255,80);c.fill();
  c.strokeStyle='#e8d9b8';c.lineWidth=7;ell(c,260,85,238,66);c.stroke();
  c.strokeStyle='#c8a06a';c.lineWidth=3;ell(c,260,85,210,56);c.stroke();
  c.fillStyle='rgba(232,217,184,.55)';
  for(let i=0;i<7;i++){c.save();c.translate(90+i*56,85);c.rotate(Math.PI/4);c.fillRect(-9,-9,18,18);c.restore();}
  c.strokeStyle='#d9c8a4';c.lineWidth=2;
  for(let i=0;i<12;i++){const yy=30+i*10;
    c.beginPath();c.moveTo(8,yy);c.lineTo(-6,yy+2);c.stroke();
    c.beginPath();c.moveTo(512,yy);c.lineTo(526,yy+2);c.stroke();}
});}
function makeFrame(w,h,col,variant){return layer(w,h,c=>{
  c.fillStyle=col;c.fillRect(0,0,w,h);
  c.fillStyle='#efe6cf';c.fillRect(8,8,w-16,h-16);
  if(variant===0){
    const g=c.createLinearGradient(0,8,0,h-8);g.addColorStop(0,'#b8cfe0');g.addColorStop(1,'#e8d9b0');
    c.fillStyle=g;c.fillRect(16,16,w-32,h-32);
    c.fillStyle='#7d9464';c.beginPath();c.moveTo(16,h-30);
    c.quadraticCurveTo(w*0.4,h-70,w-16,h-34);c.lineTo(w-16,h-16);c.lineTo(16,h-16);c.closePath();c.fill();
    c.fillStyle='#5d7a4c';ell(c,w*0.32,h-52,14,10);c.fill();
  }else{
    c.fillStyle='#e0cba8';c.fillRect(16,16,w-32,h-32);
    c.strokeStyle='#b3543e';c.lineWidth=6;
    c.beginPath();c.arc(w*0.5,h*0.55,26,Math.PI,0);c.stroke();
    c.strokeStyle='#46707e';c.beginPath();c.arc(w*0.5,h*0.62,40,Math.PI,0);c.stroke();
  }
  c.strokeStyle='rgba(255,255,255,.35)';c.lineWidth=5;
  c.beginPath();c.moveTo(14,h-20);c.lineTo(w-24,14);c.stroke();
  c.strokeStyle='#5a4a38';c.lineWidth=2;
  c.beginPath();c.moveTo(w*0.3,6);c.lineTo(w*0.7,6);c.stroke();
});}

/* ================= backdrop (wall / floor / window) ================= */
let backdrop=null;
function buildBackdrop(){
  const o=document.createElement('canvas');o.width=cv.width;o.height=cv.height;
  const c=o.getContext('2d');c.lineCap='round';
  c.setTransform(dpr*scl,0,0,dpr*scl,offX,offY);
  let g=c.createLinearGradient(0,0,0,620);
  g.addColorStop(0,'#8f7a60');g.addColorStop(.35,'#b39a78');g.addColorStop(1,'#c7ad88');
  c.fillStyle=g;c.fillRect(0,0,W,620);
  for(let i=0;i<260;i++){
    c.fillStyle=Math.random()<.5?'rgba(255,244,220,.04)':'rgba(60,44,26,.04)';
    ell(c,rnd(0,W),rnd(0,620),rnd(8,50),rnd(6,30));c.fill();
  }
  g=c.createRadialGradient(W*.5,300,200,W*.5,300,900);
  g.addColorStop(0,'rgba(0,0,0,0)');g.addColorStop(1,'rgba(46,32,18,.38)');
  c.fillStyle=g;c.fillRect(0,0,W,620);
  g=c.createLinearGradient(0,0,0,90);g.addColorStop(0,'rgba(40,28,14,.4)');g.addColorStop(1,'rgba(40,28,14,0)');
  c.fillStyle=g;c.fillRect(0,0,W,90);
  /* floor */
  g=c.createLinearGradient(0,620,0,H);
  g.addColorStop(0,'#4e3524');g.addColorStop(.25,'#6b4a30');g.addColorStop(1,'#8a6140');
  c.fillStyle=g;c.fillRect(0,620,W,H-620);
  let y=620,row=0;
  while(y<H){
    const hh=26+row*7;
    c.strokeStyle='rgba(30,18,8,.5)';c.lineWidth=2;
    c.beginPath();c.moveTo(0,y);c.lineTo(W,y);c.stroke();
    c.strokeStyle='rgba(30,18,8,.35)';
    for(let x=(row*97)%180;x<W;x+=180){c.beginPath();c.moveTo(x,y);c.lineTo(x,Math.min(y+hh,H));c.stroke();}
    c.strokeStyle='rgba(255,220,170,.06)';
    for(let i=0;i<5;i++){const gx=rnd(0,W);c.beginPath();c.moveTo(gx,y+3);c.bezierCurveTo(gx+40,y+hh*.4,gx-30,y+hh*.7,gx+20,y+hh-2);c.stroke();}
    y+=hh;row++;
  }
  /* window light pool on floor */
  c.save();c.translate(300,700);c.rotate(-0.3);c.scale(1.7,0.75);
  g=c.createRadialGradient(0,0,10,0,0,320);
  g.addColorStop(0,'rgba(255,232,180,.4)');g.addColorStop(1,'rgba(255,232,180,0)');
  c.fillStyle=g;c.beginPath();c.arc(0,0,320,0,TAU);c.fill();c.restore();
  /* baseboard */
  c.fillStyle='#d6c8a8';c.fillRect(0,598,W,26);
  c.fillStyle='rgba(255,255,255,.25)';c.fillRect(0,598,W,3);
  c.fillStyle='rgba(60,40,20,.35)';c.fillRect(0,622,W,4);
  g=c.createLinearGradient(0,596,0,640);g.addColorStop(0,'rgba(30,18,8,.35)');g.addColorStop(1,'rgba(30,18,8,0)');
  c.fillStyle=g;c.fillRect(0,624,W,40);
  /* window */
  const wx=110,wy=110,ww=220,wh=310;
  c.fillStyle='#d9cfba';rr(c,wx-16,wy-16,ww+32,wh+32,10);c.fill();
  g=c.createLinearGradient(wx,wy,wx,wy+wh);
  g.addColorStop(0,'#a8cbe4');g.addColorStop(.55,'#e8d9b8');g.addColorStop(1,'#f6dfae');
  c.fillStyle=g;c.fillRect(wx,wy,ww,wh);
  g=c.createRadialGradient(wx+60,wy+wh-70,5,wx+60,wy+wh-70,120);
  g.addColorStop(0,'rgba(255,250,220,.95)');g.addColorStop(1,'rgba(255,250,220,0)');
  c.fillStyle=g;c.fillRect(wx,wy,ww,wh);
  c.fillStyle='#8ba07a';c.beginPath();c.moveTo(wx,wy+wh);c.lineTo(wx,wy+wh-60);
  c.quadraticCurveTo(wx+70,wy+wh-110,wx+120,wy+wh-70);c.lineTo(wx+ww,wy+wh-90);c.lineTo(wx+ww,wy+wh);c.closePath();c.fill();
  c.strokeStyle='#d9cfba';c.lineWidth=10;
  c.beginPath();c.moveTo(wx+ww/2,wy);c.lineTo(wx+ww/2,wy+wh);c.moveTo(wx,wy+wh/2);c.lineTo(wx+ww,wy+wh/2);c.stroke();
  c.fillStyle='rgba(250,244,228,.55)';
  c.beginPath();c.moveTo(wx+ww-40,wy-10);c.quadraticCurveTo(wx+ww+10,wy+wh/2,wx+ww-30,wy+wh+10);
  c.lineTo(wx+ww+6,wy+wh+10);c.lineTo(wx+ww+6,wy-10);c.closePath();c.fill();
  c.strokeStyle='rgba(190,175,150,.5)';c.lineWidth=3;
  for(let i=0;i<3;i++){c.beginPath();c.moveTo(wx+ww-20+i*8,wy);c.quadraticCurveTo(wx+ww-5+i*8,wy+wh/2,wx+ww-18+i*8,wy+wh);c.stroke();}
  c.fillStyle='#e5dcc6';rr(c,wx-22,wy+wh+12,ww+44,16,4);c.fill();
  c.fillStyle='rgba(70,50,30,.3)';c.fillRect(wx-22,wy+wh+26,ww+44,4);
  /* light shaft */
  c.fillStyle='rgba(255,238,200,.10)';
  c.beginPath();c.moveTo(wx+20,wy+wh);c.lineTo(wx+ww-10,wy+wh);c.lineTo(wx+ww+180,740);c.lineTo(wx+40,760);c.closePath();c.fill();
  c.fillStyle='rgba(255,238,200,.08)';
  c.beginPath();c.moveTo(wx+60,wy+wh);c.lineTo(wx+ww-40,wy+wh);c.lineTo(wx+ww+60,730);c.lineTo(wx+120,745);c.closePath();c.fill();
  /* nails + ghost shadows where the picture frames hang */
  for(const p of [[840,175,120,150],[990,160,100,125]]){
    c.fillStyle='rgba(30,20,10,.18)';rr(c,p[0]+8,p[1]+14,p[2]-8,p[3]-8,4);c.fill();
    c.fillStyle='#4a3a28';c.beginPath();c.arc(p[0]+p[2]/2,p[1]+4,3,0,TAU);c.fill();
  }
  backdrop=o;
}

/* ================= scene state ================= */
const catX=640, groundY=596, catScale=0.68;
let stage=0, clicks=0, extra=0;
let chaos=0, spinAngle=0, spinVel=0, spinTarget=0, spinDirT=1, nextFlip=0;
let lift=0, liftVel=0, liftTarget=0, bob=0;
let worldAngle=0, worldVel=0, zoom=1, zoomKick=0, shakeAmp=0, speedNorm=0, syMul=1;
let sylAcc=0, lastT=0;
const chaosT=[0,.28,.52,.76,1];
const catCY=()=>groundY-lift-210*catScale;

const props=[];
function addProp(img,x,y,w,h){props.push({img,x,y,w,h,rot:0,dy:0,seed:rnd(0,TAU),
  tremSpd:rnd(2,4),tremAmp:rnd(.04,.1),vrSpin:rnd(.6,2.2)*(Math.random()<.5?-1:1),
  orb:false,orbTimer:0,orbDelay:rnd(0,0.8),orbA:0,orbR:0,orbS:0,orbE:0,ox:0,oy:0});}
addProp(makeRug(),380,555,520,170);
addProp(makeSofa(),780,330,480,310);
addProp(makePlant(),45,255,240,385);
addProp(makeLamp(),345,215,180,430);
addProp(makeFrame(120,150,'#7a5a3a',0),840,175,120,150);
addProp(makeFrame(100,125,'#6e4f33',1),990,160,100,125);
const rugProp=props[0], lampProp=props[3];

const motes=[],leaves=[],texts=[],minis=[];
for(let i=0;i<46;i++)motes.push({x:rnd(140,560),y:rnd(240,700),vx:rnd(2,9),vy:rnd(-4,2),r:rnd(.8,2),a:rnd(.1,.35),p:rnd(0,TAU)});
const stars=[];for(let i=0;i<130;i++){const a=rnd(0,TAU),r=Math.sqrt(Math.random())*820;
  stars.push({x:Math.cos(a)*r,y:Math.sin(a)*r*0.85,r:rnd(1,2.6),a:rnd(.3,1),tw:rnd(1,4),p:rnd(0,TAU)});}

/* grain */
const grainC=document.createElement('canvas');grainC.width=grainC.height=128;
{const g=grainC.getContext('2d'),d=g.createImageData(128,128);
 for(let i=0;i<d.data.length;i+=4){const v=110+Math.random()*40;d.data[i]=d.data[i+1]=d.data[i+2]=v;d.data[i+3]=255;}
 g.putImageData(d,0,0);}
const grainPat=ctx.createPattern(grainC,'repeat');

/* ================= audio ================= */
let AC=null,master=null,revSend=null,noiseBuf=null,noiseGain=null,noiseFilter=null,muted=false;
function initAudio(){
  if(AC||!(window.AudioContext||window.webkitAudioContext))return;
  AC=new (window.AudioContext||window.webkitAudioContext)();
  const comp=AC.createDynamicsCompressor();
  comp.threshold.value=-14;comp.ratio.value=6;
  master=AC.createGain();master.gain.value=muted?0:0.9;
  master.connect(comp);comp.connect(AC.destination);
  /* small generated room reverb */
  const conv=AC.createConvolver();
  const ir=AC.createBuffer(2,AC.sampleRate*1.5,AC.sampleRate);
  for(let ch=0;ch<2;ch++){const d=ir.getChannelData(ch);
    for(let i=0;i<d.length;i++)d[i]=(Math.random()*2-1)*Math.pow(1-i/d.length,2.8);}
  conv.buffer=ir;
  revSend=AC.createGain();revSend.gain.value=0.25;
  revSend.connect(conv);conv.connect(master);
  /* wind noise bed */
  const len=AC.sampleRate*2;noiseBuf=AC.createBuffer(1,len,AC.sampleRate);
  const d=noiseBuf.getChannelData(0);let lastS=0;
  for(let i=0;i<len;i++){const w=Math.random()*2-1;lastS=(lastS+0.02*w)/1.02;d[i]=lastS*3.5;}
  const src=AC.createBufferSource();src.buffer=noiseBuf;src.loop=true;
  noiseFilter=AC.createBiquadFilter();noiseFilter.type='lowpass';noiseFilter.frequency.value=300;
  noiseGain=AC.createGain();noiseGain.gain.value=0;
  src.connect(noiseFilter);noiseFilter.connect(noiseGain);noiseGain.connect(master);src.start();
}
function oiia(f0,dur,vol){
  if(!AC||muted)return;
  const t0=AC.currentTime+0.001,t1=t0+dur;
  const mix=AC.createGain();
  const osc=AC.createOscillator();osc.type='sawtooth';
  osc.frequency.setValueAtTime(f0*0.85,t0);
  osc.frequency.linearRampToValueAtTime(f0*1.3,t0+dur*0.35);
  osc.frequency.linearRampToValueAtTime(f0*1.05,t0+dur*0.75);
  osc.frequency.linearRampToValueAtTime(f0*0.72,t1);
  const osc2=AC.createOscillator();osc2.type='square';
  osc2.frequency.setValueAtTime(f0*0.5,t0);
  const g2=AC.createGain();g2.gain.value=0.15;
  osc.connect(mix);osc2.connect(g2);g2.connect(mix);
  const vib=AC.createOscillator();vib.frequency.value=6.2;
  const vibG=AC.createGain();vibG.gain.value=f0*0.045;
  vib.connect(vibG);vibG.connect(osc.frequency);
  /* "o" -> "ii" -> "a" formant morph: this is what makes it a voice */
  const mk=(fq,Q,gn)=>{const f=AC.createBiquadFilter();f.type='bandpass';f.frequency.value=fq;f.Q.value=Q;
    const gg=AC.createGain();gg.gain.value=gn;mix.connect(f);f.connect(gg);return f;};
  const Fa=mk(460,8,1),Fb=mk(880,9,.85),Fc=mk(2800,12,.3);
  const pts=[[0,460,880],[.35,320,2300],[.7,780,1250],[1,820,1180]];
  for(const p of pts){const tt=t0+dur*p[0];
    Fa.frequency.linearRampToValueAtTime(p[1],tt);
    Fb.frequency.linearRampToValueAtTime(p[2],tt);
    Fc.frequency.linearRampToValueAtTime(p[0]<.5?3000:2600,tt);}
  const nb=AC.createBufferSource();nb.buffer=noiseBuf;nb.loop=true;
  const nf=AC.createBiquadFilter();nf.type='bandpass';nf.frequency.value=1800;nf.Q.value=2;
  const ng=AC.createGain();ng.gain.value=0.05;
  nb.connect(nf);nf.connect(ng);
  const env=AC.createGain();
  env.gain.setValueAtTime(0,t0);
  env.gain.linearRampToValueAtTime(vol,t0+Math.min(.03,dur*.3));
  env.gain.setValueAtTime(vol,Math.max(t0+Math.min(.03,dur*.3)+.001,t1-dur*.25));
  env.gain.linearRampToValueAtTime(0,t1);
  Fa.connect(env);Fb.connect(env);Fc.connect(env);ng.connect(env);
  env.connect(master);env.connect(revSend);
  osc.start(t0);osc2.start(t0);vib.start(t0);nb.start(t0);
  osc.stop(t1+.05);osc2.stop(t1+.05);vib.stop(t1+.05);nb.stop(t1+.05);
}
function onSyllable(){
  const base=[0,170,238,333,466][stage]+extra*18;
  const f0=clamp(base*(0.85+0.55*speedNorm)*rnd(0.95,1.08),120,950);
  const dur=clamp(0.45-0.25*speedNorm-stage*0.03,0.09,0.45);
  oiia(f0,dur,0.5);
  zoomKick=1;
  if(stage>=2){
    const words=['OIIA','oiia','OIIA!','oiii','OI-IA','aiaiai'];
    texts.push({txt:words[(Math.random()*words.length)|0],x:catX+rnd(-340,340),
      y:catCY()+rnd(-260,180),rot:rnd(-.4,.4),life:.55,t:0,
      size:34+stage*13+speedNorm*60,hue:(lastT*40)%360});
  }
}

/* ================= interaction ================= */
function escalate(){
  clicks++;
  if(!AC)initAudio();
  if(AC&&AC.state==='suspended')AC.resume();
  hint.style.display='none';
  liftVel+=180; /* little hop on every click */
  const ns=Math.min(4,clicks);
  if(ns!==stage){
    stage=ns;
    if(stage===1){liftTarget=55;spinTarget=3.4;oiia(210,0.5,0.55);}
    if(stage===2){liftTarget=115;spinTarget=8;}
    if(stage===3){liftTarget=180;spinTarget=14;}
    if(stage===4){liftTarget=225;spinTarget=21;oiia(240,1.0,0.6);}
  }else{
    extra++;
    spinTarget=Math.min(46,spinTarget+2.2);
    liftTarget=Math.min(255,liftTarget+10);
    oiia(clamp(500+extra*60,500,950),0.18,0.45);
  }
}
cv.addEventListener('pointerdown',escalate);
const iconOn='<svg viewBox="0 0 24 24"><path d="M11 5 6 9H3v6h3l5 4z"/><path d="M15.5 8.5a5 5 0 0 1 0 7"/><path d="M18 6a8.5 8.5 0 0 1 0 12"/></svg><span>SOUND ON</span>';
const iconOff='<svg viewBox="0 0 24 24"><path d="M11 5 6 9H3v6h3l5 4z"/><path d="m16 9 5 6M21 9l-5 6"/></svg><span>MUTED</span>';
btn.innerHTML=iconOn;
btn.addEventListener('click',e=>{
  e.stopPropagation();muted=!muted;
  btn.innerHTML=muted?iconOff:iconOn;
  if(AC&&master)master.gain.setTargetAtTime(muted?0:0.9,AC.currentTime,0.02);
});

/* ================= drawing helpers ================= */
function drawTurntable(c,x,y,angle,s,sy,alpha){
  const na=norm(angle);
  const sec=Math.min(3,Math.floor(na/HPI)), within=na-sec*HPI;
  const w1=Math.cos(within), w2=Math.sin(within);
  const sec2=(sec+1)%4;
  const drawV=(sIdx,flip,sx,a)=>{
    if(sx<0.04||a<=0)return;
    c.save();c.globalAlpha=a;c.translate(x,y);c.scale(flip?-sx:sx,sy);
    c.drawImage(CATS[sIdx],-240*s,-620*s,480*s,620*s);c.restore();
  };
  if(w2>w1){drawV(sec2,FLIPS[sec2],w2,alpha);drawV(sec,FLIPS[sec],w1,alpha);}
  else{drawV(sec,FLIPS[sec],w1,alpha);drawV(sec2,FLIPS[sec2],w2,alpha);}
}
function drawShadow(c){
  const a=.35*clamp(1-lift/380,0,1)+.05;
  const rx=150*(1-lift/700);
  const g=c.createRadialGradient(catX,618,4,catX,618,rx);
  g.addColorStop(0,`rgba(25,15,8,${a})`);g.addColorStop(1,'rgba(25,15,8,0)');
  c.fillStyle=g;ell(c,catX,618,rx,rx*0.2);c.fill();
}
function drawPropHome(c,p){
  const cx0=p.x+p.w/2,by=p.y+p.h;
  c.save();c.translate(cx0,by+p.dy);c.rotate(p.rot);c.translate(-cx0,-by);
  c.drawImage(p.img,p.x,p.y,p.w,p.h);c.restore();
}
function drawPropOrbit(c,p,ghost){
  c.save();c.translate(p.ox,p.oy);c.rotate(p.rot+(ghost?-0.18:0));
  if(ghost)c.globalAlpha=0.25;
  c.drawImage(p.img,-p.w/2,-p.h/2,p.w,p.h);c.restore();
}
function drawPull(c,k,t){
  c.save();c.translate(catX,catCY());
  c.strokeStyle=`rgba(255,240,214,${0.10*k})`;c.lineWidth=2;
  for(let i=0;i<20;i++){
    const a=i/20*TAU+t*0.2,r0=760,r1=180+(i%5)*40;
    c.beginPath();c.moveTo(Math.cos(a)*r0,Math.sin(a)*r0*0.8);
    c.lineTo(Math.cos(a)*r1,Math.sin(a)*r1*0.8);c.stroke();
  }
  c.restore();
}
function drawVortex(c,t,alpha){
  c.save();c.globalAlpha=alpha;
  let g=c.createRadialGradient(catX,catCY(),40,catX,catCY(),950);
  g.addColorStop(0,'#452a40');g.addColorStop(.45,'#241a2c');g.addColorStop(1,'#0e0a14');
  c.fillStyle=g;c.fillRect(-200,-200,W+400,H+400);
  c.translate(catX,catCY());
  c.save();c.rotate(t*0.06);
  for(const s of stars){
    c.globalAlpha=alpha*s.a*(0.55+0.45*Math.sin(t*s.tw+s.p));
    c.fillStyle='#efe6ff';c.fillRect(s.x,s.y,s.r,s.r);
  }
  c.restore();c.globalAlpha=alpha;
  c.rotate(t*0.5);
  const hues=[36,190,315];
  for(let arm=0;arm<3;arm++){
    c.strokeStyle=`hsla(${hues[arm]},75%,62%,.15)`;c.lineWidth=70;c.lineCap='round';
    c.beginPath();c.moveTo(0,0);
    for(let r=50;r<640;r+=36){const a=arm*TAU/3+r*0.0105;c.lineTo(Math.cos(a)*r,Math.sin(a)*r*0.85);}
    c.stroke();
  }
  c.rotate(-t*0.5);
  g=c.createRadialGradient(0,0,10,0,0,300);
  g.addColorStop(0,'rgba(255,228,180,.55)');g.addColorStop(1,'rgba(255,228,180,0)');
  c.fillStyle=g;c.beginPath();c.arc(0,0,300,0,TAU);c.fill();
  c.restore();c.globalAlpha=1;
}

/* ================= main loop ================= */
let blinkNext=2.5,blinkClock=99;
function frame(ms){
  const t=ms/1000;
  let dt=t-lastT;if(!(dt>0)||dt>0.05)dt=0.016;lastT=t;

  /* --- update --- */
  chaos+=(chaosT[stage]-chaos)*Math.min(1,dt*1.6);
  if(stage>=4&&t>nextFlip){
    spinDirT*=-1;nextFlip=t+rnd(1.2,2.2);
    if(spinVel>4)oiia(140,0.3,0.4);
  }
  spinVel+=(spinTarget*spinDirT-spinVel)*Math.min(1,dt*2);
  spinAngle+=spinVel*dt;
  liftVel+=(liftTarget-lift)*10*dt-liftVel*3.5*dt;
  lift+=liftVel*dt;
  speedNorm=clamp(Math.abs(spinVel)/24,0,1);
  bob=Math.sin(t*2.6)*(6+chaos*10)+Math.sin(t*4.3)*3*chaos;
  if(stage>0)bob+=Math.sin(t*38)*2*(1-speedNorm);
  syMul=1+0.12*Math.sin(t*10)*speedNorm;
  const wvT=chaos>0.55?(stage>=4?1.4:0.5):0;
  worldVel+=(wvT-worldVel)*Math.min(1,dt*2);
  worldAngle+=worldVel*dt;
  zoomKick*=Math.pow(0.02,dt);
  zoom=1-Math.max(0,chaos-0.5)*0.3+zoomKick*0.05;
  shakeAmp=chaos*2.5+speedNorm*5+zoomKick*8;

  /* sound locked to the spin: one "oiia" per slice of rotation */
  if(AC&&stage>0){
    sylAcc+=Math.abs(spinVel)*dt;
    const angPer=Math.max(stage>=3?Math.PI*0.95:Math.PI*1.2,0.09*Math.abs(spinVel));
    while(sylAcc>=angPer){sylAcc-=angPer;onSyllable();}
    if(noiseGain){
      noiseGain.gain.value=speedNorm*0.16;
      noiseFilter.frequency.value=300+speedNorm*2500;
    }
  }

  /* props: tremble -> detach -> orbit the cat */
  const ccx=catX, ccy=catCY();
  for(const p of props){
    if(!p.orb){
      if(chaos>0.28){
        p.rot=Math.sin(t*p.tremSpd+p.seed)*p.tremAmp*(chaos-0.28)/0.3;
        p.dy=Math.sin(t*9+p.seed)*2*(chaos-0.28);
      }
      if(chaos>=0.55){
        p.orbTimer+=dt;
        if(p.orbTimer>p.orbDelay){
          p.orb=true;
          const px=p.x+p.w/2,py=p.y+p.h/2;
          p.orbR=Math.hypot(px-ccx,py-ccy)*0.85+40;
          p.orbA=Math.atan2(py-ccy,px-ccx);
          p.orbS=rnd(0.6,1.5)*(Math.random()<.5?-1:1);
          p.orbE=rnd(-30,30);
        }
      }
    }
    if(p.orb){
      p.orbA+=p.orbS*dt*(0.4+chaos*1.2);
      p.orbR+=dt*70*chaos;
      p.rot+=p.vrSpin*dt;
      p.ox=ccx+Math.cos(p.orbA)*p.orbR;
      p.oy=ccy+Math.sin(p.orbA)*p.orbR*0.8+p.orbE;
    }
  }

  /* leaves */
  if(chaos>0.3&&chaos<0.85&&Math.random()<dt*(chaos-0.3)*10){
    leaves.push({x:rnd(120,220),y:rnd(260,340),vx:rnd(-30,60),vy:rnd(-80,-20),
      r:rnd(0,TAU),vr:rnd(-4,4),life:rnd(2,4),t:0,hue:rnd(80,130)});
  }
  for(let i=leaves.length-1;i>=0;i--){
    const L=leaves[i];L.t+=dt;
    L.x+=L.vx*dt+Math.sin(t*5+L.r)*20*dt;L.y+=L.vy*dt;L.r+=L.vr*dt;
    if(stage<3)L.vy+=50*dt*chaos;
    if(L.t>L.life||L.y>H+40)leaves.splice(i,1);
  }

  /* mini cats + texts */
  if(stage>=4&&minis.length===0)
    for(let i=0;i<3;i++)minis.push({ph:i*TAU/3,R:190+i*70,spd:(i===1?-1:1)*rnd(1.2,1.9),spin:rnd(0,TAU),spinV:rnd(6,11)*(i===1?-1:1)});
  for(const m of minis){m.ph+=m.spd*dt*(0.5+chaos);m.spin+=m.spinV*dt;}
  for(let i=texts.length-1;i>=0;i--){texts[i].t+=dt;if(texts[i].t>texts[i].life)texts.splice(i,1);}

  /* idle blink */
  let blinkAmt=0;
  if(stage===0){
    blinkNext-=dt;
    if(blinkNext<0){blinkClock=0;blinkNext=2.2+Math.random()*3;}
    blinkClock+=dt;
    if(blinkClock<0.24)blinkAmt=Math.sin(Math.PI*blinkClock/0.24);
  }

  /* --- draw --- */
  ctx.setTransform(1,0,0,1,0,0);
  ctx.fillStyle='#0d0a12';ctx.fillRect(0,0,cv.width,cv.height);
  ctx.setTransform(dpr,0,0,dpr,0,0);
  ctx.translate(offX/dpr,offY/dpr);ctx.scale(scl,scl);
  ctx.translate(rnd(-shakeAmp,shakeAmp),rnd(-shakeAmp,shakeAmp));
  const pvx=catX,pvy=ccy;
  ctx.translate(pvx,pvy);ctx.rotate(worldAngle);ctx.scale(zoom,zoom);ctx.translate(-pvx,-pvy);

  if(backdrop)ctx.drawImage(backdrop,0,0,W,H);
  if(chaos>0.5){
    const k=(chaos-0.5)/0.5;
    ctx.fillStyle=`rgba(15,8,25,${0.4*k})`;ctx.fillRect(0,0,W,H);
    drawPull(ctx,k,t);
  }
  if(stage>=4&&chaos>0.9)drawVortex(ctx,t,(chaos-0.9)/0.1);

  for(const p of props){
    if(p.orb?Math.sin(p.orbA)<=0:true)drawPropOrbit?0:0;
  }
  /* back pass */
  for(const p of props){if(!p.orb)drawPropHome(ctx,p);}
  for(const p of props){if(p.orb&&Math.sin(p.orbA)<=0)drawPropOrbit(ctx,p,false);}
  /* lamp glow */
  {
    const lp=lampProp,g=0.22+0.04*Math.sin(t*13)+0.02*Math.sin(t*29);
    const lx=lp.orb?lp.ox:lp.x+lp.w/2, ly=lp.orb?lp.oy:lp.y+120;
    const gg=ctx.createRadialGradient(lx,ly,4,lx,ly,70);
    gg.addColorStop(0,`rgba(255,220,150,${g})`);gg.addColorStop(1,'rgba(255,220,150,0)');
    ctx.fillStyle=gg;ell(ctx,lx,ly,70,55);ctx.fill();
  }
  if(chaos<0.9)drawShadow(ctx);

  /* dust motes in the light shaft */
  for(const m of motes){
    m.x+=m.vx*dt;m.y+=m.vy*dt+Math.sin(t+m.p)*4*dt;
    if(m.x>580)m.x=140;if(m.y<230)m.y=700;if(m.y>710)m.y=240;
    ctx.fillStyle=`rgba(255,240,210,${m.a})`;
    ctx.fillRect(m.x,m.y,m.r,m.r);
  }

  /* speed lines */
  if(speedNorm>0.35){
    ctx.save();ctx.translate(ccx,ccy);ctx.rotate(spinAngle*0.5);
    ctx.strokeStyle=`rgba(255,245,220,${0.25*speedNorm})`;ctx.lineWidth=2;
    for(let i=0;i<16;i++){
      const a=i/16*TAU,r0=190+(i%4)*30;
      ctx.beginPath();
      ctx.moveTo(Math.cos(a)*r0,Math.sin(a)*r0*0.85);
      ctx.lineTo(Math.cos(a)*(r0+60*speedNorm),Math.sin(a)*(r0+60*speedNorm)*0.85);
      ctx.stroke();
    }
    ctx.restore();
  }

  /* giant ghost cat looming behind (stage 4) */
  if(stage>=4){
    ctx.save();ctx.translate(ccx,ccy-140);ctx.rotate(t*0.4);ctx.globalAlpha=0.08;
    ctx.drawImage(sprWide,-240*2.4,-620*2.4,480*2.4,620*2.4);ctx.restore();ctx.globalAlpha=1;
  }

  /* THE CAT */
  const cy=groundY-lift+bob;
  const s=catScale*(1+0.012*Math.sin(t*2.2)*(stage===0?1:0.3));
  if(stage===0){
    ctx.drawImage(sprSleepy,catX-240*s,cy-620*s,480*s,620*s);
    if(blinkAmt>0.05){
      const ey=cy-440*s;
      for(const dx of[-44,44]){
        ctx.fillStyle='#e7d9ba';ell(ctx,catX+dx*s,ey,26*s,24*s*blinkAmt+0.5);ctx.fill();
        ctx.strokeStyle='rgba(90,70,45,.6)';ctx.lineWidth=2;
        ctx.beginPath();ctx.moveTo(catX+dx*s-20*s,ey+2);ctx.lineTo(catX+dx*s+20*s,ey+2);ctx.stroke();
      }
    }
  }else{
    const G=speedNorm>0.1?6:1;
    const stepA=Math.min(0.32,Math.abs(spinVel)*0.016);
    for(let i=G-1;i>=0;i--){
      const a=spinAngle-i*stepA*(spinVel<0?-1:1);
      const al=i===0?1:0.28*(1-i/G)+0.05;
      drawTurntable(ctx,catX,cy,a,s,syMul,al);
    }
  }

  /* front pass: orbiters crossing the lower half */
  for(const p of props){if(p.orb&&Math.sin(p.orbA)>0){drawPropOrbit(ctx,p,false);if(stage>=4)drawPropOrbit(ctx,p,true);}}

  /* leaves */
  for(const L of leaves){
    ctx.save();ctx.translate(L.x,L.y);ctx.rotate(L.r);
    ctx.fillStyle=`hsl(${L.hue},40%,35%)`;
    ctx.beginPath();ctx.moveTo(0,0);ctx.quadraticCurveTo(6,-8,0,-18);ctx.quadraticCurveTo(-6,-8,0,0);ctx.fill();
    ctx.restore();
  }

  /* mini oiia cats */
  for(const m of minis){
    const mx=ccx+Math.cos(m.ph)*m.R,my=ccy+Math.sin(m.ph)*m.R*0.7+40;
    drawTurntable(ctx,mx,my,m.spin,0.34,1,0.95);
  }

  /* screen-space overlays */
  ctx.setTransform(dpr,0,0,dpr,0,0);
  ctx.translate(offX/dpr,offY/dpr);ctx.scale(scl,scl);
  for(const tx of texts){
    const a=1-tx.t/tx.life;
    ctx.save();ctx.translate(tx.x,tx.y-tx.t*60);ctx.rotate(tx.rot);ctx.globalAlpha=a;
    ctx.font=`900 ${tx.size}px system-ui,sans-serif`;
    ctx.fillStyle=stage>=4?`hsl(${tx.hue},90%,72%)`:'#f6e7c4';
    ctx.strokeStyle='rgba(30,15,5,.8)';ctx.lineWidth=4;
    ctx.strokeText(tx.txt,0,0);ctx.fillText(tx.txt,0,0);
    ctx.restore();
  }
  ctx.globalAlpha=1;
  const vg=ctx.createRadialGradient(W/2,H*0.42,300,W/2,H*0.42,900);
  vg.addColorStop(0,'rgba(0,0,0,0)');vg.addColorStop(1,`rgba(15,8,4,${0.45+chaos*0.2})`);
  ctx.fillStyle=vg;ctx.fillRect(0,0,W,H);
  ctx.globalAlpha=0.05;ctx.globalCompositeOperation='overlay';
  ctx.fillStyle=grainPat;ctx.fillRect(0,0,W,H);
  ctx.globalCompositeOperation='source-over';ctx.globalAlpha=1;

  requestAnimationFrame(frame);
}

/* ================= boot ================= */
function resize(){
  dpr=Math.min(2,window.devicePixelRatio||1);
  cv.width=innerWidth*dpr;cv.height=innerHeight*dpr;
  scl=Math.max(innerWidth/W,innerHeight/H);
  offX=(innerWidth-W*scl)/2*dpr;offY=(innerHeight-H*scl)/2*dpr;
  buildBackdrop();
}
addEventListener('resize',resize);
resize();
requestAnimationFrame(frame);
</script>
</body>
</html>

The notes

Opening realism. The room is built like a lit set, not a backdrop: warm wall with mottled texture and corner occlusion, a window with sky gradient, sun bloom, curtain folds and a translucent light shaft that lands in a pool on perspective-spaced floorboards, a lamp that's actually on (its glow flickers per-frame), furniture with directional shading (window-light from the left, shadow on the right), dust motes drifting in the beam, film grain and a vignette. The cat sells "not a photo is hard to tell" with a radial-shaded head, ~240 directional fur strokes, a scalloped white bib, whiskers, breathing, random blinks and half-lidded sleepy eyes. The realism gives out exactly at the silhouette: up close the fur is painterly strokes, not strands, and the moment it spins it obviously becomes an illustrated sprite — which is fine, because that's the joke arriving.
Oiia-cat fidelity. It's the turntable fake that makes it read as the meme: four baked views (front, profile, back, mirrored profile) blended by cosine weighting as the yaw angle advances, so the cat visibly narrows, goes edge-on, shows you the back of its head, and comes around again — instead of a flat sprite rotating in-plane. The face only stays readable while the spin is slow; once speed rises, six angular motion-blur ghosts smear the face exactly like the source edits, and the wide, lens-staring eyes + cream/white palette + wrapped tail do the breed-identification work.
The four stages. (1) Liftoff — eyes snap wide, it hops off the rug with a spring overshoot and starts winding up; the lamp swings, frames tremble on their nails, leaves shake loose. (2) The room notices — higher and faster, furniture vibrates hard, leaves fly and flutter, "oiia" captions pop with each syllable, the picture frames swing. (3) Gravity resigns — the whole room slowly rotates around the cat, every prop (sofa, plant, lamp, rug, frames) tears loose and orbits it on growing elliptical paths, the walls darken and get pulled inward along radial streaks, spin chatters twice per revolution. (4) Send-to-a-friend — the room is replaced by a rotating star vortex with spiral arms, a giant ghost cat looms behind, three mini oiia cats orbit in counter-rotation, orbiting furniture leaves rainbow after-images, the spin randomly reverses, the cat pulses squash-and-stretch, the camera kick-zooms on every syllable, and flashing colored OIIA text rides the beat — and every extra click past stage 4 keeps raising speed, pitch, and orbit count.
The voice. It's a source–filter synth: a sawtooth (plus a quiet sub-octave square) runs through three parallel bandpass formant filters whose frequencies are automated through the diphthong "o → ii → a" (F1/F2: 460/880 → 320/2300 → 780/1250 Hz), with a meow-shaped pitch arc (rise, sustain, fall), 6 Hz vibrato, a breath-noise layer, and a touch of generated room reverb — the formant morph is what makes it read as a voice saying "oiia" rather than a beep. It stays locked to the spin because syllables are triggered by accumulated rotation angle (one per revolution early, two-plus per revolution later, rate-capped), and each syllable's pitch and duration are computed from the current angular velocity, so pitch and rate climb together with the spin; a filtered wind-noise bed also tracks speed. Audio context is created only on the first click, and the mute button kills the master gain.
With more time. I'd replace the four-sprite turntable with a real pseudo-3D cat — a head/body built from a few depth-offset layers so the 45° views show a genuinely turned face instead of a squashed front view — and I'd move the room onto a depth-sorted scene graph so orbiting furniture can pass convincingly in front of and behind the cat with per-object shadows, plus a proper "the room is a diorama being shaken" parallax at stage 3.

Attachments

nex-agi/nex-n2.6 — page