Earlier quoted context omitted.
> I got to Challenge #5 by just having the elevators go to every floor like in the first example. Strange, that strategy doesn't allow me to get past challenge 2 (just going to every floor one after the other).
Guess, I got lucky, haha. I should probably go back to challenge 2 and learn how to program these then.
The first 5 are easy to "brute force" but six is making me think a bit more.