Chaotic mess with two states
```
rules = {
'a': [[1,-1,'a'], [0,+1,'b']],
'b': [[1,-1,'a'], [0,+0,'b']],
}
```
Two state square spiral
```
rules = {
'a': [[1,+1,'a'], [0,-1,'b']],
'b': [[0,-1,'a'], [1,+1,'b']],
}
```
Single-state Turing machine with 10k cycles of chaos and then it suddenly builds a highway.
```
rules = {
'a': [[1,+1,'a'], [0,-1,'a']]
}
```
It seems like A and B are fairly evenly preferred, as are X and Y. My older watches are A/X, while I'm getting used to my new one that is B/Y (with extra markers for local noon and sunrise/set).