Simple virus simulation. Kinda laggy, u should use turbowarp. Recommended initial organism minimum is around 30. Posted this three days ago (I think) and WOW. 273 views???? WOW!
The red line is infected organisms, blue is total organisms, green is healthy organisms and yellow is sick organisms. When a healthy organism touches an infected organism, it turns sick and then soon infected. If an infected organism doesn't infect a healthy organism in a certain amount of time, it dies.