ref: 12b3c82014efd24fa57037c001c7d3ce78204e5a
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