Optional Puzzle 5 -
Sector E46 - [57:26]
Solution 1 - First Door: Green + Green, Second Door: Purple + Green, then pull the blue orb. Go back to the first room and do First Door: Purple + Purple, Second Door: Blue, Third Door (right): Green + Green + Green.
Solution 2 - First Door: Green + Green, Second Door: Purple + Green, Third Door: Green + Purple + Blue. The blue in the final door must be pulled from the middle room, and it will shut the door behind you.