CONWAY'S GAME OF LIFE
The game is played on a two-dimensional array of cells, some of which start as
"alive" and others as "dead."  When progressing from one state to the next, the
fate of a given cell is determined by counting the number of live cells
adjacent to it (including diagonally).  If the number is less than two or more
than three, the cell in consideration dies or remains dead.  If the number is
two or three and the current cell is alive, it remains alive.  If the number is
exactly three and the current cell is dead, it is given life.