ref: 71cda09d1ec39aa29dc4bcdd332fa64ca7169d59
dir: /sys/games/lib/life/piston2/
...........x................. xx........xx...............xx xx.......xx................xx ..........xx..xx............. ............................. ............................. ............................. ..........xx..xx............. xx.......xx................xx xx........xx...............xx ...........x.................