ref: 99db038e2825266e84ddb381718f3d047dc6d733
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