Tri-Axial Rotation of a Floating Volume of Light , by ron cooper , 1972 , installation , Light and Space style , Sky, Line, Atmosphere, Cloud
A drawing of a room with a door in it.
A drawing of a room with a door on the right side.  The door is closed and has a small black lock on it.  There are lines drawn on the wall and on the left side of the room.  A diamond shape is in the middle of the rooms.  It is drawn on a white background.