ref: 5a51e900dd113a1a5f2d2a0e8bac067fbc7da3ae
dir: /sys/games/lib/life/barberpole/
xx........... x.x.......... ............. ..x.x........ ............. ....x.x...... ............. ......x.x.... ............. ........x.x.. ............. ..........x.x ...........xx