In the video, there is a brush moving slowly back and forth on a white surface. The brush tries to stay parallel to the vertical axis of the frame. It projects its size, which is in line with the width of a door frame, onto the floor at the entrance of the exhibition hall, creating a glowing carpet-like effect. The footage depicts the brush gently sweeping over the area within the frame, without actually providing any real cleaning effect, and any bodies or objects that may interfere with the projection.