ref: 5fd2e746e1a2a00d2acbc0c3b1924b1ea22101e8
dir: /sys/games/lib/life/c5/
..............x ..............x ..............x ..............x ..............x ..............x ..............x ..............x ..............x ..............x ..............x ..............x xxxxx.xxxxx.xxxxx.xxxxx.xxxxx ..............x ..............x ..............x ..............x ..............x ..............x ..............x ..............x ..............x ..............x ..............x ..............x