"The Last Piano" Animated Short

A comprehensive prompt for creating a 2-minute animated short film "The Last Piano" in a crayon/watercolor style, featuring a robot, piano, and cat, with synchronized Web Audio music and dynamic lighting effects in a single HTML file.

Prompt

Create a single self-contained index.html: a ~2-minute animated short called "the last piano", in a hand-drawn crayon and watercolor style. Scene: a small rusty robot with one glowing eye walks through a dark, empty city in the rain and finds an old upright piano under a broken streetlamp. Later a black cat shows up to listen. Music: compose an original piano piece (Am - F - C - G) and synthesize it in Web Audio. It starts with one unsure note and grows into full chords. Sync: one timeline drives both. The robot's hands hit the keys that are actually sounding. Every note turns on a window in the city, the rain turns to snow, and the final chord lights up everything that's left. Rules: Canvas 2D only, no libraries, no external assets.

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