Traffic Lights

A Game with Cellular Automata

Play and Download

  • Play Traffic lights online


  • Download .apk for android


Game Info

"Traffic Lights" originally called "Semaphore", was invented by Alan Parr.

In a usual game, opponents alternate clicking squares on an m x n board and by doing so, progress squares forward (empty, green, yellow, red). The board begins empty and once a square is red, it cannot be changed. The players race to make a row, column, or diagonal of three consecutive squares of the same color.

In this implementation, we play on a 3 x 4 board.

It is also interesting to search for the maximum number of clicks that can be made to a board before the game ends. Visit my GitHub repository reverse-traffic-lights for more information on that.


Unity developement by Peter E. Francis and Justin Chovenek, with advisement from Dr. Todd W. Neller.