I chose to revist my project from the randomness day, which already used `touching color`. Adding both a third state (immune) and a "healing" zone increased the complexity of tracking states slightly and also forced me to think more critically about when I should be "infecting" - previously infected dots were trying to infect each other which caused unecessary slowdowns. I'm also playing around with the graphic effects a bit, which I've never toyed with much.
