Right now you're facing towards a wall. Now slightly turn right and climb up the two steps which are in front of you. There is a staircase in front of you, move towards the staircase and climb up two steps which are in front of you. Now turn left and enter in to the room, you can see platforms to your left and right, there is a book on the platform to your left and a plant pot on the platform to your right, move forward and stand in between them facing towards the glass window and it is your end point.