Patio Concrete Room Escape

Assume that you moved to a new house and picked a Concrete room as your room in the new house. Unfortunately your room door got locked and as today your parents went to work in early morning itself, so you can’t seek any help from others. But you know that there must a spare must be in this room. So use your skills to collect the necessary items in the grey room to fetch the key to escape from the Concrete room