When you use the first glowstone on the wall near the rotating room, the corridor on the opposite site will open. So you wait at the room, until the opening of the room comes by, and then run into the room. (The room is like a revolting door, but with only one opening.) Then you wait on the opposite site until the opening comes by there, and run out again. In that area you should find the second glowstone. Which should give you access to the third area.
|