Run Detail

completedbeam-1.0-501b-a23b

70good

Every model's answer from this round

Recorded for these videos

27:18

Gemini 4 Hydrogen: Cheaper Tokens, More Expensive Answers?

Nov 13, 2026 · YouTube

18:40

ERNIE 5.5 Flash Preview vs GLM 5.3 Flash: Baidu's new model is very impressive!

Nov 11, 2026 · YouTube

36:22

Fable 5.2 robbing me blind, plus: Nex AGI's N2.6 vs GLM 5.3 Flash

Nov 11, 2026 · YouTube

14:03

Gemini 4 Carbon: Can it handle my challenges? (First look with one-shot coding tests)

Nov 10, 2026 · YouTube

47:51

Ranking major U.S. Open-Weights Models. (Where does Ripple 65B fit in?)

Nov 6, 2026 · YouTube

10:57

"Crouton Alpha": the latest super-efficient coding model by Meta?

Nov 3, 2026 · YouTube

38:58

Testing Particle-1: a post-trained DeepSeek V4.1 Flash specializing in coding and efficiency

Oct 28, 2026 · YouTube

29:55

Kimi K3.1 Pro Looked Incredible. Then I Kept Testing.

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?

Oct 20, 2026 · YouTube

17:58

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

Oct 15, 2026 · YouTube

16:04

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

Oct 15, 2026 · YouTube

16:43

Gemini 4 Argon: Great 🐈 Animation, but a broken escalator. (Coding challenge vs Opus 5.5, Sol 6.1)

Oct 13, 2026 · YouTube

16:37

Meta's new "Muse Wonder" AI is impressive... but can it compete with Anthropic's models?

Oct 12, 2026 · YouTube

11:12

WOW... Haiku 5.5 is very impressive. RIP OpenAI?

Oct 7, 2026 · YouTube

22:47

Mistral Large 4 Is Cheap. But Is It Good Enough to Compete?

Oct 6, 2026 · YouTube

22:02

Is Pareto 26.10 Preview Just Routing to GPT Sol? I Tested It Against Sol 6.1 Pro

Oct 1, 2026 · YouTube

11:22

I Tested Sonnet 5.5 Against Opus 5.5. Is It Actually Cheaper?

Sep 28, 2026 · YouTube

19:21

I Tested the Stealth "Space Bunny Alpha" Model Before It Went Offline

Sep 23, 2026 · YouTube

10:58

So... how much better is Claude Opus 5.5 vs. GPT-6 Sol, really?

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

100.0s

Total Tokens

31,389

Input Tokens

781

Output Tokens

30,608

Reasoning Tokens

21,493

Reasoning Effort

default

Est. Cost

$0.0308

Started

10/16/2026, 4:26:10 PM

OR Provider

Nebius

Finish Reason

stop

Generation ID

gen-1792167970-h6byKonCvUa8KEKzN45p

Turns (1)

Turn #1

781 in30,608 out21,493 reasoning31,389 total99.9s

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 Cat</title>
<style>
  :root {
    --catY: 0px;
  }
  * { box-sizing: border-box; }
  html, body {
    margin: 0; height: 100%; overflow: hidden;
    background: radial-gradient(circle at 50% 40%, #1a1f2e 0%, #05060a 70%);
    font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
    color: #e8ecf4;
  }
  .scene {
    position: fixed; inset: 0;
    perspective: 920px;
    perspective-origin: 50% 42%;
    overflow: hidden;
  }
  .world {
    position: absolute; inset: 0;
    transform-style: preserve-3d;
    transform: translate3d(0,0,0) translateZ(-200px) rotateX(8deg) rotateY(0rad);
    will-change: transform, filter;
  }
  .room {
    position: absolute; left: 50%; top: 50%;
    transform-style: preserve-3d;
    transform: translate(-50%,-50%);
    transition: opacity .6s ease;
  }
  .wall {
    position: absolute; left: 50%; top: 50%;
    width: 1040px; height: 640px;
    transform-origin: center center;
    border: 1px solid rgba(0,0,0,.18);
    box-shadow: inset 0 0 90px rgba(0,0,0,.16);
  }
  .wall.back {
    transform: translate(-50%,-50%) translateZ(-520px);
    background: linear-gradient(180deg, #dfe7f3 0%, #aebfd8 100%);
  }
  .wall.left {
    transform: translate(-50%,-50%) rotateY(90deg) translateZ(-520px);
    background: linear-gradient(180deg, #c8d4e6 0%, #95a8c4 100%);
  }
  .wall.right {
    transform: translate(-50%,-50%) rotateY(-90deg) translateZ(-520px);
    background: linear-gradient(180deg, #c8d4e6 0%, #95a8c4 100%);
  }
  .ceiling {
    position: absolute; left: 50%; top: 50%;
    width: 1040px; height: 1040px;
    transform: translate(-50%,-50%) rotateX(-90deg) translateZ(-320px);
    background: linear-gradient(180deg, #f4f7fb 0%, #d8e0ec 100%);
    box-shadow: inset 0 0 120px rgba(0,0,0,.08);
  }
  .floor {
    position: absolute; left: 50%; top: 50%;
    width: 1040px; height: 1040px;
    transform: translate(-50%,-50%) rotateX(90deg) translateZ(-320px);
    background:
      repeating-linear-gradient(90deg, rgba(105,70,42,.95) 0 46px, rgba(88,58,34,.95) 46px 92px),
      linear-gradient(180deg, #8a5a35, #6b4328);
    box-shadow: inset 0 0 160px rgba(0,0,0,.42);
  }
  .window {
    position: absolute; left: 120px; top: 110px;
    width: 260px; height: 180px;
    background: linear-gradient(180deg, #9fd0ff 0%, #eaf6ff 100%);
    border: 8px solid #f2f2f2;
    box-shadow: inset 0 0 30px rgba(255,255,255,.5), 0 0 40px rgba(120,180,255,.25);
  }
  .window::after {
    content: ""; position: absolute; inset: 0;
    background: linear-gradient(120deg, rgba(255,255,255,.35), transparent 45%);
  }
  .baseboard {
    position: absolute; left: 0; right: 0; bottom: 0; height: 18px;
    background: linear-gradient(180deg, #f0f0f0, #cfcfcf);
  }
  .furniture {
    position: absolute; left: 50%; top: 50%;
    transform-style: preserve-3d;
    transition: opacity .6s ease;
  }
  .rug {
    position: absolute;
    width: 520px; height: 360px;
    transform: translate3d(-260px, 305px, -80px) rotateX(90deg);
    background: radial-gradient(ellipse at center, #b85b5b 0%, #7a3434 70%);
    border-radius: 50%;
    box-shadow: 0 0 40px rgba(0,0,0,.35);
    opacity: .85;
  }
  .sofa {
    position: absolute;
    width: 360px; height: 110px;
    transform: translate3d(-420px, 235px, -260px);
    background: linear-gradient(180deg, #6b7f95, #4f6175);
    border-radius: 18px 18px 8px 8px;
    box-shadow: 0 18px 30px rgba(0,0,0,.35);
  }
  .sofa::before {
    content: ""; position: absolute; left: 18px; right: 18px; top: -42px;
    height: 52px; border-radius: 16px 16px 6px 6px;
    background: linear-gradient(180deg, #7f93aa, #5f738a);
  }
  .table {
    position: absolute;
    width: 220px; height: 120px;
    transform: translate3d(120px, 275px, 120px) rotateX(90deg);
    background: linear-gradient(180deg, #c9a27a, #9a7450);
    border-radius: 12px;
    box-shadow: 0 10px 24px rgba(0,0,0,.3);
  }
  .lamp {
    position: absolute;
    width: 16px; height: 150px;
    transform: translate3d(300px, 180px, -300px);
    background: linear-gradient(180deg, #d8d8d8, #8a8a8a);
    border-radius: 8px;
  }
  .lamp::before {
    content: ""; position: absolute; left: -26px; top: -34px;
    width: 68px; height: 40px;
    background: linear-gradient(180deg, #f2e6c8, #d8c89a);
    clip-path: polygon(15% 0, 85% 0, 100% 100%, 0 100%);
    filter: drop-shadow(0 0 24px rgba(255,220,150,.55));
  }
  .lamp-light {
    position: absolute; left: 50%; top: 50%;
    width: 900px; height: 900px;
    transform: translate(-50%,-50%) translate3d(300px, 260px, -300px) rotateX(90deg);
    background: radial-gradient(circle, rgba(255,232,175,.34) 0%, rgba(255,232,175,.12) 35%, transparent 70%);
    mix-blend-mode: screen;
    pointer-events: none;
    animation: flicker 3.6s infinite ease-in-out;
  }
  @keyframes flicker {
    0%, 100% { opacity: .86; }
    47% { opacity: .95; }
    52% { opacity: .78; }
    68% { opacity: .92; }
  }
  .plant {
    position: absolute;
    width: 44px; height: 90px;
    transform: translate3d(-360px, 230px, 260px);
    background: linear-gradient(180deg, #5f8f5f, #3f6a3f);
    border-radius: 22px 22px 8px 8px;
    box-shadow: 0 12px 24px rgba(0,0,0,.28);
  }
  .plant::before {
    content: ""; position: absolute; left: -18px; top: -34px;
    width: 80px; height: 52px;
    background: radial-gradient(circle at 40% 40%, #7fbf7f, #4f8f4f);
    border-radius: 50%;
  }

  .cat {
    position: absolute; left: 50%; top: 50%;
    width: 0; height: 0;
    transform-style: preserve-3d;
    cursor: pointer;
    user-select: none;
    -webkit-tap-highlight-color: transparent;
  }
  .cat * { transform-style: preserve-3d; }
  .body {
    position: absolute; left: -96px; top: -58px;
    width: 192px; height: 132px;
    border-radius: 50% 46% 52% 48%;
    background: radial-gradient(circle at 34% 28%, #ffffff 0%, #f2e6d0 46%, #d8c2a0 100%);
    box-shadow: inset -22px -16px 42px rgba(0,0,0,.18), 0 24px 40px rgba(0,0,0,.34);
  }
  .body::before {
    content: ""; position: absolute; inset: 0; border-radius: inherit;
    background: radial-gradient(circle at 30% 24%, rgba(255,255,255,.62), transparent 46%);
  }
  .body::after {
    content: ""; position: absolute; inset: 0; border-radius: inherit;
    background: repeating-radial-gradient(circle at 22% 30%, rgba(255,255,255,.13) 0 1px, transparent 1px 7px);
    mix-blend-mode: soft-light;
  }
  .head {
    position: absolute; left: -70px; top: -198px;
    width: 140px; height: 136px;
    border-radius: 50%;
    background: radial-gradient(circle at 36% 30%, #ffffff 0%, #f3e7d2 50%, #d9c3a2 100%);
    box-shadow: inset -14px -12px 28px rgba(0,0,0,.16), 0 14px 28px rgba(0,0,0,.28);
    transform: translateZ(26px);
  }
  .head::before {
    content: ""; position: absolute; inset: 0; border-radius: inherit;
    background: radial-gradient(circle at 32% 26%, rgba(255,255,255,.58), transparent 44%);
  }
  .ear {
    position: absolute; top: -34px;
    width: 44px; height: 50px;
    clip-path: polygon(50% 0%, 0% 100%, 100% 100%);
    background: linear-gradient(180deg, #f3e7d2, #d9c3a2);
    filter: drop-shadow(0 6px 8px rgba(0,0,0,.18));
  }
  .ear.left { left: 12px; transform: rotateZ(-28deg); }
  .ear.right { left: 84px; transform: rotateZ(28deg); }
  .ear .inner {
    position: absolute; left: 24%; top: 34%;
    width: 52%; height: 46%;
    clip-path: polygon(50% 0%, 0% 100%, 100% 100%);
    background: linear-gradient(180deg, #f2a7a7, #e08a8a);
  }
  .eye {
    position: absolute; top: 46px;
    width: 32px; height: 38px;
    border-radius: 50%;
    background: radial-gradient(circle at 50% 44%, #151515 0 50%, #000 51% 100%);
    box-shadow: inset 0 0 8px rgba(0,0,0,.55);
  }
  .eye.left { left: 28px; }
  .eye.right { left: 80px; }
  .eye .pupil {
    position: absolute; left: 50%; top: 52%;
    width: 13px; height: 18px;
    margin: -9px 0 0 -6.5px;
    border-radius: 50%;
    background: #000;
  }
  .eye .shine {
    position: absolute; left: 62%; top: 24%;
    width: 8px; height: 8px;
    border-radius: 50%;
    background: rgba(255,255,255,.92);
  }
  .nose {
    position: absolute; left: 61px; top: 84px;
    width: 18px; height: 12px;
    border-radius: 50%;
    background: radial-gradient(circle at 50% 40%, #f0a0a6, #d97f86);
  }
  .mouth {
    position: absolute; left: 54px; top: 98px;
    width: 32px; height: 10px;
    border-bottom: 2px solid #8a5a5a;
    border-radius: 0 0 50% 50%;
  }
  .leg {
    position: absolute; bottom: -78px;
    width: 34px; height: 74px;
    border-radius: 18px;
    background: linear-gradient(180deg, #f3e7d2, #d9c3a2);
    box-shadow: inset -6px -8px 14px rgba(0,0,0,.12);
  }
  .leg.fl { left: -74px; transform: rotateZ(10deg); }
  .leg.fr { left: 130px; transform: rotateZ(-10deg); }
  .leg.bl { left: -40px; transform: rotateZ(4deg); }
  .leg.br { left: 96px; transform: rotateZ(-4deg); }
  .paw {
    position: absolute; left: -4px; bottom: -6px;
    width: 42px; height: 18px;
    border-radius: 12px;
    background: linear-gradient(180deg, #f7efe2, #e2d0b4);
  }
  .tail {
    position: absolute; left: 150px; top: -18px;
    width: 18px; height: 118px;
    border-radius: 9px;
    transform-origin: 50% 100%;
    transform: rotateZ(34deg) translateZ(-12px);
    background: linear-gradient(180deg, #f3e7d2, #d9c3a2);
    box-shadow: inset -4px -6px 10px rgba(0,0,0,.12);
  }

  .ghosts { position: absolute; inset: 0; pointer-events: none; }
  .ghost {
    position: absolute; left: 50%; top: 50%;
    opacity: 0;
    filter: blur(3px) brightness(1.05);
    pointer-events: none;
  }

  .fx {
    position: fixed; inset: 0;
    pointer-events: none;
    z-index: 5;
  }
  .ui {
    position: fixed; right: 18px; bottom: 18px;
    z-index: 10;
    display: flex; gap: 10px; align-items: center;
  }
  button {
    appearance: none; border: 1px solid rgba(255,255,255,.22);
    background: rgba(10,12,18,.55);
    color: #e8ecf4;
    padding: 10px 14px; border-radius: 999px;
    font: inherit; font-size: 13px;
    backdrop-filter: blur(8px);
    cursor: pointer;
  }
  button:hover { background: rgba(25,28,40,.7); }
  .hint {
    position: fixed; left: 50%; bottom: 26px;
    transform: translateX(-50%);
    z-index: 10;
    font-size: 13px; letter-spacing: .08em; text-transform: uppercase;
    color: rgba(232,236,244,.72);
    text-shadow: 0 2px 12px rgba(0,0,0,.6);
    transition: opacity .8s ease;
    pointer-events: none;
  }
  .scene[data-stage="1"] .cat { filter: drop-shadow(0 0 18px rgba(255,235,190,.25)); }
  .scene[data-stage="2"] .room { filter: saturate(1.15) contrast(1.05); }
  .scene[data-stage="3"] .world { filter: saturate(1.45) contrast(1.08); }
  .scene[data-stage="4"] .cat { filter: brightness(1.18) saturate(1.3); }
</style>
</head>
<body>
<div class="scene" id="scene" data-stage="0">
  <div class="world" id="world">
    <div class="room" id="room">
      <div class="wall back">
        <div class="window"></div>
        <div class="baseboard"></div>
      </div>
      <div class="wall left"><div class="baseboard"></div></div>
      <div class="wall right"><div class="baseboard"></div></div>
      <div class="ceiling"></div>
      <div class="floor"></div>
      <div class="lamp-light"></div>
    </div>
    <div class="furniture" id="furniture">
      <div class="rug"></div>
      <div class="sofa"></div>
      <div class="table"></div>
      <div class="lamp"></div>
      <div class="plant"></div>
    </div>
    <div class="cat" id="cat">
      <div class="tail"><div class="paw" style="left:2px;bottom:-4px;width:14px;height:10px;"></div></div>
      <div class="body"></div>
      <div class="head">
        <div class="ear left"><div class="inner"></div></div>
        <div class="ear right"><div class="inner"></div></div>
        <div class="eye left"><div class="pupil"></div><div class="shine"></div></div>
        <div class="eye right"><div class="pupil"></div><div class="shine"></div></div>
        <div class="nose"></div>
        <div class="mouth"></div>
      </div>
      <div class="leg fl"><div class="paw"></div></div>
      <div class="leg fr"><div class="paw"></div></div>
      <div class="leg bl"><div class="paw"></div></div>
      <div class="leg br"><div class="paw"></div></div>
    </div>
    <div class="ghosts" id="ghosts"></div>
  </div>
  <canvas class="fx" id="fx"></canvas>
</div>
<div class="ui">
  <button id="mute">Sound: on</button>
</div>
<div class="hint" id="hint">click the cat</div>

<script>
(() => {
  const scene = document.getElementById('scene');
  const world = document.getElementById('world');
  const room = document.getElementById('room');
  const furniture = document.getElementById('furniture');
  const cat = document.getElementById('cat');
  const ghostsEl = document.getElementById('ghosts');
  const fx = document.getElementById('fx');
  const fctx = fx.getContext('2d');
  const muteBtn = document.getElementById('mute');
  const hint = document.getElementById('hint');

  let stage = 0;
  let clicks = 0;
  let spin = 0;
  let roomSpin = 0;
  let spinSpeed = 0;
  let roomSpeed = 0;
  let height = 0;
  let scale = 1;
  let targetSpinSpeed = 0;
  let targetRoomSpeed = 0;
  let targetHeight = 0;
  let targetScale = 1;
  let shakeAmp = 0;
  let targetShake = 0;
  let roomOpacity = 1;
  let targetRoomOpacity = 1;
  let floatY = 0;
  let targetFloatY = 0;
  let ghosts = [];
  let particles = [];
  let muted = false;
  let intensity = 0;

  let audioCtx = null;
  let masterGain = null;
  let voiceSource = null;
  let voiceBuffer = null;

  function resize() {
    fx.width = window.innerWidth;
    fx.height = window.innerHeight;
  }
  window.addEventListener('resize', resize);
  resize();

  function createVoiceBuffer(ctx) {
    const sr = ctx.sampleRate;
    const phonemes = [
      ['o',0.10],['i',0.08],['a',0.12],
      ['o',0.10],['i',0.08],['a',0.12],
      ['o',0.10],['i',0.08],['a',0.08],
      ['i',0.08],['o',0.12],['o',0.12],
      ['o',0.12],['a',0.10],['i',0.08]
    ];
    const F = {
      a: [820,1220,2600],
      e: [500,1700,2500],
      i: [310,2200,3000],
      o: [500,900,2500],
      u: [350,700,2300]
    };
    const BW = [90,110,130];

    let total = 0;
    const sched = phonemes.map(([v,d]) => {
      const s = total; total += d; return { v, d, s, e: total };
    });
    const n = Math.floor(total * sr);
    const data = new Float32Array(n);
    const segIndex = new Int32Array(n);
    let si = 0;
    for (let i = 0; i < n; i++) {
      const t = i / sr;
      while (si < sched.length - 1 && t >= sched[si].e) si++;
      segIndex[i] = si;
    }

    let maxAbs = 0;
    for (let i = 0; i < n; i++) {
      const t = i / sr;
      const seg = sched[segIndex[i]];
      const next = sched[(segIndex[i] + 1) % sched.length];
      const local = Math.min(1, Math.max(0, (t - seg.s) / seg.d));
      const formants = [0,1,2].map(k => F[seg.v][k] * (1 - local) + F[next.v][k] * local);
      const f0 = 165 * (1 + 0.012 * Math.sin(2 * Math.PI * 5.2 * t));
      const env = Math.pow(Math.sin(Math.PI * local), 0.8);
      let smp = 0;
      for (let k = 1; k <= 28; k++) {
        const freq = k * f0;
        let a = 0;
        for (let j = 0; j < 3; j++) {
          const df = freq - formants[j];
          a += Math.exp(-0.5 * (df / BW[j]) ** 2);
        }
        a *= (1 / k) * 0.9;
        smp += a * Math.sin(2 * Math.PI * freq * t);
      }
      smp += (Math.random() * 2 - 1) * 0.015 * env;
      smp *= env * 0.7;
      data[i] = smp;
      if (Math.abs(smp) > maxAbs) maxAbs = Math.abs(smp);
    }
    if (maxAbs > 0) {
      for (let i = 0; i < n; i++) data[i] = (data[i] / maxAbs) * 0.85;
    }
    const buffer = ctx.createBuffer(1, n, sr);
    buffer.copyToChannel(data, 0);
    return buffer;
  }

  function ensureAudio() {
    if (audioCtx) {
      if (audioCtx.state === 'suspended') audioCtx.resume();
      return;
    }
    audioCtx = new (window.AudioContext || window.webkitAudioContext)();
    masterGain = audioCtx.createGain();
    masterGain.gain.value = muted ? 0 : 0.6;
    masterGain.connect(audioCtx.destination);
    voiceBuffer = createVoiceBuffer(audioCtx);
    voiceSource = audioCtx.createBufferSource();
    voiceSource.buffer = voiceBuffer;
    voiceSource.loop = true;
    voiceSource.playbackRate.value = 0.5;
    voiceSource.connect(masterGain);
    voiceSource.start();
  }

  function ensureGhosts(n) {
    while (ghosts.length < n) {
      const g = cat.cloneNode(true);
      g.removeAttribute('id');
      g.classList.add('ghost');
      g.style.pointerEvents = 'none';
      ghostsEl.appendChild(g);
      ghosts.push(g);
    }
  }

  function spawnBurst(n, type) {
    const cx = window.innerWidth / 2;
    const cy = window.innerHeight / 2 - height;
    for (let i = 0; i < n; i++) {
      particles.push({
        x: cx + (Math.random() - 0.5) * 120,
        y: cy + (Math.random() - 0.5) * 120,
        vx: (Math.random() - 0.5) * (type === 'cat' ? 5 : 3),
        vy: (Math.random() - 0.5) * (type === 'cat' ? 5 : 3) - 1,
        life: 1,
        decay: 0.0015 + Math.random() * 0.004,
        type,
        size: (type === 'cat' ? 4 : 2) + Math.random() * (type === 'cat' ? 7 : 4),
        hue: Math.random() * 360,
        rot: Math.random() * Math.PI * 2
      });
    }
    if (particles.length > 1200) particles.splice(0, particles.length - 1200);
  }

  function applyStage(s) {
    scene.dataset.stage = s;
    if (s >= 1) {
      targetSpinSpeed = 4;
      targetRoomSpeed = -1.2;
      targetHeight = 72;
      targetScale = 1.02;
      targetShake = 0.6;
      targetRoomOpacity = 1;
      targetFloatY = 34;
    }
    if (s >= 2) {
      targetSpinSpeed = 10;
      targetRoomSpeed = -2.8;
      targetHeight = 175;
      targetScale = 1.08;
      targetShake = 2.2;
      targetFloatY = 86;
      ensureGhosts(4);
      spawnBurst(70, 'debris');
    }
    if (s >= 3) {
      targetSpinSpeed = 20;
      targetRoomSpeed = -5.6;
      targetHeight = 305;
      targetScale = 1.22;
      targetShake = 4.4;
      targetFloatY = 165;
      ensureGhosts(8);
      spawnBurst(130, 'spark');
    }
    if (s >= 4) {
      const extra = Math.max(0, clicks - 4);
      targetSpinSpeed = 32 + extra * 3;
      targetRoomSpeed = -8.2 - extra * 1.1;
      targetHeight = 425 + extra * 22;
      targetScale = 2.25 + extra * 0.18;
      targetShake = 8.5 + extra * 1.2;
      targetRoomOpacity = 0;
      targetFloatY = 270;
      ensureGhosts(12);
      spawnBurst(220, 'cat');
    }
  }

  cat.addEventListener('click', (e) => {
    e.stopPropagation();
    ensureAudio();
    clicks++;
    if (clicks === 1) stage = 1;
    else if (clicks === 2) stage = 2;
    else if (clicks === 3) stage = 3;
    else { stage = 4; intensity = clicks; }
    applyStage(stage);
    if (clicks > 0) hint.style.opacity = '0';
  });

  muteBtn.addEventListener('click', (e) => {
    e.stopPropagation();
    muted = !muted;
    muteBtn.textContent = muted ? 'Sound: off' : 'Sound: on';
    if (masterGain && audioCtx) {
      masterGain.gain.setTargetAtTime(muted ? 0 : 0.6, audioCtx.currentTime, 0.05);
    }
  });

  let last = performance.now();
  function frame(now) {
    const dt = Math.min(0.05, (now - last) / 1000);
    last = now;
    const time = now / 1000;

    spinSpeed += (targetSpinSpeed - spinSpeed) * (1 - Math.exp(-dt * 2.4));
    roomSpeed += (targetRoomSpeed - roomSpeed) * (1 - Math.exp(-dt * 2.0));
    height += (targetHeight - height) * (1 - Math.exp(-dt * 2.2));
    scale += (targetScale - scale) * (1 - Math.exp(-dt * 1.8));
    shakeAmp += (targetShake - shakeAmp) * (1 - Math.exp(-dt * 3.0));
    roomOpacity += (targetRoomOpacity - roomOpacity) * (1 - Math.exp(-dt * 1.6));
    floatY += (targetFloatY - floatY) * (1 - Math.exp(-dt * 2.0));

    spin += spinSpeed * dt;
    roomSpin += roomSpeed * dt;

    const shakeX = (Math.random() * 2 - 1) * shakeAmp * (1 + spinSpeed * 0.04);
    const shakeY = (Math.random() * 2 - 1) * shakeAmp * (1 + spinSpeed * 0.04);

    world.style.transform = `translate3d(${shakeX}px,${shakeY}px,0) translateZ(-200px) rotateX(8deg) rotateY(${roomSpin}rad)`;
    room.style.opacity = roomOpacity.toFixed(3);
    furniture.style.opacity = roomOpacity.toFixed(3);
    furniture.style.transform = `translateY(${-floatY}px) rotateY(${roomSpin * 0.28}rad)`;

    if (stage >= 3) {
      world.style.filter = `hue-rotate(${time * 110}deg) saturate(1.45) contrast(1.08)`;
    } else {
      world.style.filter = '';
    }

    const blur = Math.min(10, spinSpeed * 0.28);
    const idleScale = stage === 0 ? 1 + Math.sin(time * 1.25) * 0.004 : 1;
    cat.style.filter = `blur(${blur}px) brightness(${1 + stage * 0.08})`;
    cat.style.transform = `translate(-50%,-50%) translateY(${-height}px) rotateY(${spin}rad) scale(${scale * idleScale})`;

    ghosts.forEach((g, i) => {
      const lag = (i + 1) * 0.13;
      const gSpin = spin - lag * Math.max(0.8, spinSpeed * 0.12);
      const gHeight = height - (i + 1) * 13;
      const op = stage >= 2 ? Math.max(0, 0.46 - i * 0.032) * Math.min(1, spinSpeed / 4) : 0;
      g.style.opacity = op.toFixed(3);
      g.style.transform = `translate(-50%,-50%) translateY(${-gHeight}px) rotateY(${gSpin}rad) scale(${scale * 0.985})`;
    });

    if (audioCtx && voiceSource) {
      const rate = Math.min(4, 0.5 + spinSpeed / 8);
      voiceSource.playbackRate.setTargetAtTime(rate, audioCtx.currentTime, 0.05);
      const gain = muted ? 0 : Math.min(1, 0.42 + stage * 0.12 + spinSpeed * 0.012);
      masterGain.gain.setTargetAtTime(gain, audioCtx.currentTime, 0.05);
    }

    if (stage >= 4 && Math.random() < 0.35) spawnBurst(4, 'cat');
    if (stage >= 3 && Math.random() < 0.12) spawnBurst(2, 'spark');

    const gravity = stage >= 4 ? -0.035 : 0.025;
    for (let i = particles.length - 1; i >= 0; i--) {
      const p = particles[i];
      p.x += p.vx * (1 + spinSpeed * 0.08);
      p.y += p.vy * (1 + spinSpeed * 0.08);
      p.vx *= 0.985;
      p.vy += gravity;
      p.rot += 0.08;
      p.life -= p.decay * (1 + spinSpeed * 0.02);
      if (p.life <= 0) particles.splice(i, 1);
    }

    fctx.clearRect(0, 0, fx.width, fx.height);
    fctx.save();
    fctx.globalCompositeOperation = 'lighter';
    for (const p of particles) {
      fctx.globalAlpha = Math.max(0, p.life);
      if (p.type === 'cat') {
        fctx.fillStyle = `hsl(${p.hue}, 70%, 72%)`;
        fctx.beginPath();
        fctx.ellipse(p.x, p.y, p.size * 1.5, p.size, p.rot, 0, Math.PI * 2);
        fctx.fill();
        fctx.fillStyle = `hsl(${p.hue}, 60%, 88%)`;
        fctx.beginPath();
        fctx.ellipse(p.x, p.y - p.size * 0.9, p.size * 0.7, p.size * 0.65, p.rot, 0, Math.PI * 2);
        fctx.fill();
      } else if (p.type === 'debris') {
        fctx.fillStyle = `hsla(${p.hue}, 35%, 62%, .85)`;
        fctx.save();
        fctx.translate(p.x, p.y);
        fctx.rotate(p.rot);
        fctx.fillRect(-p.size, -p.size * 0.6, p.size * 2, p.size * 1.2);
        fctx.restore();
      } else {
        fctx.fillStyle = `hsl(${p.hue}, 90%, 70%)`;
        fctx.beginPath();
        fctx.arc(p.x, p.y, p.size, 0, Math.PI * 2);
        fctx.fill();
      }
    }
    fctx.restore();
    fctx.globalAlpha = 1;

    requestAnimationFrame(frame);
  }

  requestAnimationFrame(frame);
})();
</script>
</body>
</html>

The notes

The opening frame is built from CSS 3D planes, gradients, inset shadows, a window, furniture, a rug, and a floor lamp; the cat is a stack of shaded rounded primitives with pseudo-element fur and eye shine. The realism gives out once motion starts: there is no real global illumination, no physics-based fur, and the high-speed blur, ghosts, and particles are approximations rather than true motion blur or fluid simulation.
It reads as the Oiia cat because the cream-and-white front-facing cat, wide eyes, and square sitting pose are matched first, then the spin is a vertical-axis rotation whose speed, height, blur, and sound all ramp together; the “oiia” loop is synthesized as a looping vocal buffer whose playback rate is tied directly to spin speed.
Stage one lifts and spins the cat with a gentle room pull and the first sound; stage two adds orbiting ghost cats, floating furniture, and debris; stage three folds color and gravity into a faster vortex with more ghosts; stage four dissolves the room into orbiting cat-and-debris particles while the cat scales up and the sound reaches its maximum rate.
The voice is a manually generated AudioBuffer of diphthong-like phoneme segments, each built from harmonic sums shaped by interpolated formants, envelopes, vibrato, and breath noise; a looping AudioBufferSourceNode has its playbackRate ramped from the same spin-speed value that drives the visual rotation.
With more time I would replace the CSS primitive cat with a true textured 3D mesh, add real shadow casting and contact shadows, and make the room destruction in stage four a consistent 3D fragmentation rather than a 2D particle overlay.

Attachments

reflection/beam-1.0-501b-a23b — page