You had found a scrap of paper indicating that they had tried every combination at the first arch other then Blue Yellow Orange  and Blue Orange Yellow. You all used BYO to get to the room with the gargoyle statue, which brought you to the hall of spheres.<br/><br/>also, the first arch wasn't glowing until you touched it. The second arch [at the end of the sphere hall, which you didn't play with] was dark as well. This one is already lit up.