Stochastic cellular automata

Stochastic cellular automata are like a big jigsaw puzzle spread out across a table. It starts out with several small pieces of the puzzle (called "cells"). Each cell has rules it must obey, like "if the cell is red, it must move one space to the right." The cells follow these rules to determine where they should go, which makes it look like they are "growing" like a puzzle. But there is a twist: the cells can follow the rules in a random or "stochastic" way! This means that the cells can choose to follow the rules differently each time, so what the puzzle looks like at the end will be different each time you play.