Yet another one of those messing around projects, took literally 10 minutes to make. Oh well, have fun watching these "ants" do absolutely nothings but make pretty patterns! *note: you'd probably be better off running it in turbo mode. Also, ants stop moving after touching the edge. I could have made them loop but I didn't want to spend too much time on this.
It's called Langton's Ant, and runs on the simple rule that when the ant hits a black space, it turns right while replacing the square beneath with white, and on white spaces creates a black square while turning left.