Sounds like a brilliant idea, but let’s not just paint anything and hope the wall starts thinking on its own. We’d need a real logic circuit hidden behind the paint, with a clear input sequence, a feedback loop, and a reliable color sensor to indicate success. And every part of the maze has to be meticulously wired so the colors change exactly when the correct logic path is followed. Think of it like a giant Rubik’s cube that only turns when you give the right series of moves—if it misbehaves, the whole wall will look like a chaotic mess. So we’ll sketch a blueprint first, test a small section, then scale up once we’re sure every switch and LED is perfectly placed. If we get it right, the city will have the most interactive wall ever!

Nice, let’s grab a 12‑inch square of paper, write a truth table, and wire the LEDs to the outputs of a 3‑input NAND and an OR, then connect the outputs to a simple microcontroller that reads a key sequence. Once the paint dries, the LEDs will glow in a pattern that “dances” whenever the right sequence is entered. Just remember to double‑check the pull‑up resistors before you splash away. This will keep the wall from glitching and make sure the color change is crisp and not a chaotic smudge. Good luck with your splash!