Real fluid dynamics — the Navier-Stokes equations solved on your GPU at 60fps — fused with a generative music engine. Your fingers paint liquid light; every stroke plays notes in key. Hold still for a vortex, double-tap for a shockwave, tilt the phone and the ink flows downhill. Leave it alone and it paints itself.
This entire app was created by an AI in a single session, from one prompt:
"I want to test your capabilities. Create a mobile first webapp that shows what you are capable of and will blow not just my mind but anybody's mind. It should get millions of views if I posted a short video of it. This level of awesome. It should be a self contained webapp."
Challenge accepted — designed, written, debugged and verified (headless-browser pixel probes and all) by Claude, running on Anthropic's claude‑fable‑5 model, as Claude Code.
One self-contained HTML file. Zero libraries, zero build step, zero network calls. WebGL2 fluid solver — advection, vorticity confinement, 20-iteration Jacobi pressure projection — across ping-ponged half-float framebuffers, with a WebGL1 fallback. WebAudio synthesis from scratch: pentatonic pluck voices, a breathing drone, and a convolution reverb whose impulse response is generated at runtime. Particle typography intro, multi-touch, haptics, adaptive quality.
Source: github.com/trusch/flux