Worm_CW.py

#!/usr/bin/python3

states = (
    (   #A (index 0)
        (1, 1,  1), #0, (BitToWrite, MoveBy, NextStateIndex)
        (1, 1,  0)  #1
    ),
    (   #B (index 1)
        (0, 1, 0),
        (0, 1, 0)
    )        
)