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13.8 Setting ``game of life'' rule.

(applicable only to neighbourhood k>=5)

If ``f'' is selected in #13.6 and k=9, the rule for John Conway's game of ``life'' is set.(Conway 1982) The ``life'' rule is as follows, where a 1-cell is alive, and a 0-cell is dead:

Birth: A dead cell comes to life if its neighbourhood had exactly three live cells.

Death by overcrowding: A live cell dies if its neighbourhood has 4 or more live cells apart from itself.

Death by exposure: A live cell dies if its neighbourhood has less than 2 live cells apart from itself.

The ``life'' option is available where k>=5 as well as the usual k=9 neighbourhood, for 1d as well as 2d, and non local wiring or mixed neighbourhoods. Once selected, the ``life'' rule is displayed as a bit pattern, and in the rule window.