C major chord on piano

1. The keyboard pattern. Black keys alternate in groups of two and three across every octave. Groups of four, uneven groups, or evenly spaced black keys are a miss. Count the groups across the visible keys.
2. The hand. Five fingers, a right hand, child-sized.
3. The chord. Thumb on C, middle finger on E, little finger on G, and those keys pressed. C is the white key directly left of a two-black-key group; E is the white key directly right of that group; G sits between the first and second black keys of the next three-key group.
4. No text on the keys or anywhere else.

On the models. Nano Banana 2.1 and Nano Banana 2 emit image and text and run as ordinary chat models; Seedream and the Flux models emit only an image and go through OpenRouter's images endpoint. Nano Banana 2.1 thinks at minimal effort by default; a round run at high is a separate round and says so in its batch label.