Press the green flag to start Darwinian evolution. Shift+Click the green flag to speed things along. If the squares touch the wall, they will die. The best 10 individuals will pass on their behavior to the next generation. There is also a chance for an individual or 2 to just spawn with a blank behavior every generation.
Code by me. Music was in the Scratch Library. Edit 1: Added a list that shows the all of the ais' brains. Press the spacebar to see it.