You are in the middle of the staircase facing towards the wall, slightly turn left, go up the stairs, now you are in front of the mirror, turn right, go straight, now you are in front of the wall which has painting on it, turn right, there is washroom in front of you on the right side, go straight and enter the washroom in front of you, go straight till the end and stop in front of the western toilet, this is your final destination.