You're standing at the entrance of the door. Walk into the open door. Turn left, walk forward towards the wide entrance. At the wide entrance, turn left, walk into the open door. Walk forward towards the mat. Turn right where you could see three closed doors. Walk forward towards the middle closed door. Now exit through the middle door. Turn left and walk through the passage, till you reach the end. Stand near the second pillar on the right counting from the end. This would be your end point.