Right now you're facing towards a door. Now slightly turn left and exit the room. Now turn right, there is a staircase in front of you, move towards the staircase and turn left. Now get down the stairs and reach the ground floor, move forward towards the door which is in the middle and exit the room through the door. Now turn right, you can see a walkway in front of you, move forward in the walkway up to the end where you can see a glass window in front of you and it is your end point.