ref: 775a4bea4386c12067057de0e56dd8baa34f43ec
dir: /sys/games/lib/life/c4/
...........x ...........x ...........x ...........x ...........x ...........x ...........x ...........x ...........x ...........x xxxxx.xxxxx.xxxxx.xxxxx ...........x ...........x ...........x ...........x ...........x ...........x ...........x ...........x ...........x ...........x