Opus 5.5 makes a 2-minute animated short in a single index.html
A 2-minute hand-drawn crayon-style short runs entirely in one index.html: Opus composed 338 notes, the piano is synthesized live in Web Audio, and 598 windows light up with the notes, with the full prompt included.
Opus 5.5 is a one-person motion studio on steroids. this 2-minute film + original piano score was made entirely with Opus 5.5. no After Effects. no stock music. no assets. Here's the full breakdown + prompt: • 338 notes across 32 bars, composed by Opus • the piano is synthesized live in Web Audio • every one of the 598 windows lights up on a real note • all of it lives in one index.html. Zero dependencies The 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. Run this prompt yourself, then read the full course on how to build a motion design studio with Opus 5.5 in the article below
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