You are facing towards a curtain, turn around you can see an open door, enter inside, walk straight, you can see an open door on your left, enter inside, go straight you will be able to see one more open door in front of you, enter inside, go straight and take left, walk straight and take right, and stand in front of a glass window, there will be a closed door in front of you, there will be a glass door left side to you, its your destination.