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The behavior of all 256 possible cellular automata with rules involving two colors and nearest neighbors. In each case, thirty steps of evolution are shown, starting from a single black cell. Note that some of the rules are related just by interchange of left and right or black and white (e.g. rules 2 and 16 or rules 126 and 129). There are 88 fundamentally inequivalent such elementary rules.

From Stephen Wolfram: A New Kind of Science [citation]