Authors: Alex Tee Neng Heng, David G. Green

In Wire world, devised by Brian Silverman, electrons move around wire circuits. This model shows how CAs can be used to simulate a variety of physical phenomena. (See A. K. Dewdney, Scientific American, January, 1990).

A cell in wire world can be in one of 3 different states:

• Head
• Tail
• Wire

At each time step, the following transitions occur:

• Head -> Tail
• Tail -> Wire
• Wire -> Head if one or two of the neighbouring cells are Heads