Now, you are facing towards the wall. Turn slightly right and move towards the open brown door. Pass through that door and turn to your left and walk straight you can find an open brown door in front of you. Pass through that door and take slightly right where you can find a staircase. Take the stairs and move up towards right. Again, turn to your left where you can find a staircase. Take the stairs and go up. Once you reach up, that will be your end point where you can find a wall in front of you and a white grill on your right side.