1. Pick up the little disc with the lightning bolt and put it in the hole to the right of the door.
2. Press the purple+gold bar then hit the lightning button. The R above the door will light up.
3. Press the gold+green bar then hit the lightning button. The G above the door will light up.
4. Press the purple+green bar then hit the lightning button. The B above the door will light up and open the door. If you messed up at any time, it'll reset and you'll have to start from the beginning.