ref: 2e8af772a56629c5ddba4add975d957cf7d8a09a
dir: /sys/games/lib/life/barberpole/
xx........... x.x.......... ............. ..x.x........ ............. ....x.x...... ............. ......x.x.... ............. ........x.x.. ............. ..........x.x ...........xx