ref: f899b2fe3c091ccab33673f9fea9d1d99c0c2940 dir: /sys/games/lib/life/billiard.clock/
....xx...... ....xx...... ............ ....xxxx.... xx.x..x.x... xx.x.x..x... ...x.x..x.xx ...x....x.xx ....xxxx.... ............ ......xx.... ......xx....