shithub: plan9front

ref: b3c9249500d1f6f2df42c1543c4deb87789510b5
dir: /sys/games/lib/life/fisheater/

.....x.
......x
......x
...x..x
....xxx
.......
.......
.......
.......
.......
.......
.......
.......
.......
..xx...
...x...
xxx....
x......