shithub: plan9front

ref: 6b4b8e405ae17d5004085df03d166cddcc99c11b
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....