Apart from the plaster and color are the windows to one of the basic elements of the structure of the facades. The windows of the Bauhaus are all steel, not glass drain and simple. Never had the color black but dark gray, and gray has the advantage that the distance does not recognize frames, so that seems to be a large area. Thus we see that the Bauhaus worked a lot with effects, whether light or optical illusions, but also did so with psychology, as depending on these effects are also influenced by the mood of the people who worked and studied in it.