Take an about turn, start walking straight near to the ladder which is beside the book shelf, from there walk straight near to the glass window which is to your right side from there turn a bit to your left side and start walking straight through the narrow corridor and stand beside the white color bench, from there start moving straight until you see white color sofa and again go straight and stand where you see white color door to your left side from there turn a bit right turn and start moving straight until you see staircases.