Derp. I figured someone else would beat me to it. Press or click. It goes through 3 contrasting pairs (based on the wikipedia article): http://jere.in/opponent

Derp. I figured someone else would beat me to it. Press or click. It goes through 3 contrasting pairs (based on the wikipedia article): http://jere.in/opponentprocess.html http://jere.in/opponentprocess.html