If you have to guess any solution, that means you've probably missed something that you might need to know for later - I'd recommend going back to that room and trying to find the solution the intended way. You need to use an item to find the solution.
did you realize that the eye symbol was the one flashing in the beginning of the game?
and which room did react when you pulled the levers?
so I wonder what happens if another rooms symbol is flashing instead...
and you used the levers...
and always keep track of where everything is via the map on the top left.
If that's what I think, that isn't a clue. There is a solution to the code that should be very self explanatory when you find it. Anyway - the next thing you need to do is figure out what all the buttons in the blue circle room are doing. You need to observe what changes when you hit the buttons. It may look like nothing changes but something is happening!