Hmm, I should clarify that in-game. On the first level, there are 4 settings to get through:
1up 2up
1up 2down
1down 2up
2down 2up
Then on the next level,
1up 2up 3up
1up 2up 3down
1up 2down 3up
1up 2down 3down
1down 2up 3up
1down 2up 3down
1down 2down 3up
1down 2down 3down
So the object is to go through them all without hitting one twice. Flipping any switch changes it from down to up, or back. Hope this helps & sorry for the confusion!