Puzzle Room Escape 25

[Mistery]

Try your skills at solving brand new puzzles and escape from the puzzle room. Good luck!

Play Here

Please use spoilers to give hints:
[spoiler=Title Here]Enter text here...[/spoiler]

Please do not post a video walkthrough for 7 days.

[bagonow]

Third one was pretty easy.....
first one

first one (=15) turn both of them first (L+R), then only L and only L one more time.

but I dont understand the logic