The Turbine Hall

Press the orange button and go to the next room on the left and read the pamphlet on the table. Then use the old machine on the left by picking aup a punch card and entering the code for MARY according to the code. You will then be asked what program you want, select the MANUALOVERRIDE.EXE by entering number 2 to the punch card.

Go upside to the next room which will have a huge machine. Now instead of cogs, you will be playing with reels. Put the reels so you will be able to drag the tape passes over all the lights, from start to end. Go upside again afterwards and make your way to the top left room. Click on the projector and complete the circuit by joining A-A and B-B. When you realise you need a power source, plug in your lemon. Watch the video projected on the screen and you will learn the exit code. Leave this room and go to the top right room, entering code 49463. Then go outside and enter this number to the other side of the room.