shithub: plan9front

ref: 6118d778581b44e5c41a04a60d4aa8e6cad4a37c
dir: /sys/games/lib/life/skyline/

........xx.....
x.x.....x.x.x..
xx.x.xx.x.xx.x.
...x.x.x.....x.
...xx........xx