This project is an Ant. It is a cellular automaton. The ant looks at the colour it is touching. It turns 90 degrees one way if it is a yellow, and 90 degrees the other way if it is blue. To learn more about this type of Ant, see http://www.webalice.it/anna.nardella/ant.html or look up "ant cellular automaton" in your favourite search engine. Things to try: Try adding a third colour that makes the ant turn in a third direction.
