I have to say I can't understand the hint on the scroll either, but fortunately, this puzzle is easy enough to figure out logically.
How to approach the orb puzzle: start by left clicking on each orb to see how it affects the doors. Green means open. Orange means toggle. Red means close. Get a pen and paper and write out a little table of your observations.
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×Doors: 1 2 3 4 5 6
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Orb 1: T C T T T T
Orb 2: C T O T T C
Orb 3: T T T C T T
Orb 4: T T C T T C
Orb 5: T O T T O
Orb 6: C T C O O T
Now work backwards. You want to open all the doors, so the last orb can't close any of them. The last orb is
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×Orb 5. That takes care of doors 3 and 6.
What should the next to the last orb do?
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×It should open door 1 by toggling it from a closed position. And it should close doors 2, 4, and 5, because these will be toggled by the last orb.
Continue the logic from here...
To open all the doors, you need to hit a total of
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×3 orbs.
Good luck!