Right now you are in front of the portrait on the wall. Turn around, you will find an opened big white door which is the exit of the room. Once you are out of that room, take right. You will find an upstairs. Go through it and move forward, you will find an opened door. Pass through it and take right. You will find another opened door. Enter into that room, go straight. Now, you can find entrance to the washroom. Enter into that and there you will reach your end point at the entrance of the washroom and in front of the wash basin and stop.