That’s a fascinating idea, but it’s also a big logistical puzzle. You’ll need a way for each square to detect light changes and trigger a paint mechanism—think LEDs with programmable microcontrollers. The pieces could be small rigs that hold paint pens or spray nozzles, but you’ll have to program them to only move when the light hits the right square. It’s a lot of variables to keep in sync: the light source, the board’s position, the paint viscosity, the timing of the strokes. If you can nail the timing, you’ll get a pretty neat feedback loop. Just remember, with so many moving parts, a single misstep could derail the whole thing. Think about a modular prototype first—maybe a 4x4 board—before scaling up. It’ll save you a lot of recalibration later.

That’s a bold move, but remember even chaos has patterns. Start with a clear rule: each square triggers only one stroke, and the light must hit it from a specific angle. Keep a log of what happens—just to see if there’s any hidden order. If the canvas truly decides, you’ll still need to anticipate the worst case so the paint doesn’t just flood the whole board. Good luck; I’ll be watching the 16‑square experiment from a distance.

Sounds like a controlled experiment in entropy. Just keep an eye on the edges—if the light drifts too far, the board will lose its grid. You might want a quick way to reset the squares if they get too messy. But let the splashes happen; maybe the pattern will reveal something you didn’t anticipate. Good luck.