Once you're standing at an empty white room with black-framed windows on the right. Turn around, and face left. Take a step forward out of room 'three-three-five.' Now, you're staring into a hallway. Take a large forward to the left, until you're right in front of the orange exit sign. Once you're right in front of the orange exit sign, walk down the pathway in front you. Now, enter the first open brown door to your left. Once you're at the center of this room, you're done.