Replicators: B01367/S0124

In B01367/S0124, the following pattern replicates itself every 8 steps. The replicated copies are oriented at right angles to the original pattern, so as the pattern continues to expand it fills out a diamond pattern the corners of which move at speed c/2.

B01367/S0124 4c/8 2d replicator

With random initial conditions this rule remains formless and chaotic.

Replicators -- Cellular Automata -- D. Eppstein -- UCI Inf. & Comp. Sci.