First you want to head over to the Projector screen and touch it , itll bring up "A=1 , B=2, C=3... Z=8" using this you can determine its a 9 number code each letter adds one , up to 9 then resets to 1 for the next 9 letters etc. Then you find the bookshelves on the side of the room have black pieces and white pieces the black pieces spell out LOVE so you use this to determine the code = L.O.V.E aka 3.6.4.5.