ref: 17ebe55031ae6945ad1f671b69267a672328e4b1
dir: /sys/games/lib/life/billiard5/
.........xx.. ........x.x.. ..xx....x.... ...x..xx.x... ...x.x...x... xx.x.x.x.x.xx xx.x.x.x.x.xx ...x.....x... xx.x....xx.xx xx.x..x..x.xx ...x.x.x.x... ...x..xx.x... ..xx....x.... ........x.x.. .........xx..