With the silver refrigerator on your right, walk straight until you get to the stairs. Go up the stairs and stop once you reach the very top.
Walk forward, and turn right towards the stairs. Walk all the way up the staircase to the top. Stop at the top of the stairs next to a white door.
Leave the kitchen area and turn right. When you reach the stairs go up them unitl you can't go higher. Go through the doorway and stop there and wait.