Round and Round and Round

The glider gun in the Game of Life was a fairly large and largely counterintuitive structure. The current rules allow for a much simpler structure. A couple of pages back, we saw that two white cells side by side spawned two gliders. Two green cells side by side will also do the trick. The gliders are contained in a channel made of red cells before they are let free.

Gliders are shot out of a gun and routed around by several turners. When they get back around they collide with the wall of red cells and vanish. The length of the "barrel" of the gun controls the timing in a subtle way.

With these rules, the gliders are easy to produce and easy to route. From here, it's a small step to begin to make some simple digital logic.

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Brian Silverman
Note: This page has Java content.