Right now you're facing towards a closed door. Now turn right and exit the room through the open door which is in front of you. There are two open doors to your right, move towards the second open door and turn right. There is a staircase in front of you, move towards the staircase and climb up the stairs to your right. You can see a staircase in front of you, move towards the staircase and stand in front of it and it is your end point.