ref: d68f4adeba6ef0db7590cf7c4e1518f4d4bdedff
dir: /sys/games/lib/life/billiard4/
........xx... ........x.... .........x... ........xx... .....xx...xx. ....x..xxx..x ....x.....xx. .....x...x... xx.x.x...x... x.xx.x.xx.... ....x.x...... ....x.x...... .....x.......