I was learning how to work with Cloudflare Workers and implemented something called a Pixel Mosaic: https://rishikeshs.com/mosaic/.

It's a live pixel mosaic where anyone can change the color, with the color being chosen randomly, so the chances of two adjacent tiles having the same color are quite low. I also log the country to see where people who have clicked it are from.

I am currently working on a desktop 8x8 LED grid to sync the same pattern on my desk.