A segmented worm travels along a pseudo-random path
Maximum clock divider will probably be best
| # | Input | Output |
|---|---|---|
| 0 | clock | LED segment a |
| 1 | disable auto-reset | LED segment b |
| 2 | manual reset | LED segment c |
| 3 | disable /16 clock divider ("turbo mode") | LED segment d |
| 4 | display 2 or 3 worm segments | LED segment e |
| 5 | LED segment f | |
| 6 | LED segment g | |
| 7 |