The concept of an advertising agency office interior is on optical illusion. Crossing the office threshold, the visitors see a blue square hovering in the air. The square is immaterial, however, everything that is inside is blue, while the outside interior is completely white. The blue square is an image of a television screen. It is intended to display the main activity of the agency, which is to create TV commercials. The effect of a square suspended in space is achieved by mechanical painting of all planes and objects located in one zone, which is viewed from one certain point. From all other points of view, the square disintegrates, and the boundary between blue and white acquires more sophisticated and therefore intriguing outlines. The idea is thematically close to the advertising activities and thus it would be perfectly traced in cinematographic production.