Classic version of Conway's Game Of Life, now in Technicolor!
Simply watch the cell automata do its thing. Here's what's happening: Every "generation", or when we switch from one grid to the next, has each cell check it's number of "alive" neighbors. Alive neighbors are a random color, dead neighbors are simply off. Whether a cell lives or dies from one generation to the next is determined by how many neighbors they have. If a cell is alive and has less than 2 neighbors it dies of loneliness, if it has more than 3 neighbors it dies from overcrowding. If a cell is dead and has exactly 3 neighbors it revives in the next generation. Based on these rules you get a facscinating living grid of cells that will (eventually) have an unknown endinng state.