ref: c92d7e3cedbccdbd8a585bde4b870c8e760c5c9d dir: /sys/games/lib/life/billiard2/
.....x..... ....x.x.... ...x.x.x.xx ...x...x.xx xx.xx..x... x.x....x... ...xxxx.... ........... .....xx.... .....xx....