Turn behind from the place where you're standing and exit the room. Now, move little forward and turn right. You can see a staircase, get down the stairs. From here, turn behind and walk into the room which is in front of you. Now, turn right ad walk in the passage till you reach a bathtub in front of you. Now, slightly turn left and move forward, stand in the middle of the bathtub and that is the end point.