Examples of the evolution of continuous cellular automata from random initial conditions. As discussed on page 155, each cell here can have any gray level between 0 and 1, and at each step the gray level of a given cell is determined by averaging the gray levels of the cell and its two neighbors, adding the specified constant, and then keeping only the fractional part of the result. The behavior produced once again falls into distinct classes that correspond well to the four classes seen on previous pages in ordinary cellular automata.

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