WireWorld is a two-dimensional four-color cellular automaton introduced by Brian Silverman in 1987. The rule for the automaton uses the cell's old value a together with the number u of its eight neighbors that are set to 1 according to a system that roughly models the flow of currents in wires according to the following rules. 0. The color 0 is considered background, and always stays as background. 1. The color 1 is considered an electron head, and always turns into an electron tail. 2. The color 2 is an electron tail, and always turns into wire.