ref: 8289cfc5ecbb7c27b71861be511701bf94f91f23
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