Piet Mondrian is the painter who has had the greatest influence on modern design. He is famous for works created by artistically arranging the vertical and horizontal black lines and the primary colors of red, blue, and green that we commonly encounter in our daily lives. Beyond that, there is absolutely no sense of clutter whatsoever. Whenever I look at Mondrian's paintings, stained glass always comes to mind. Perhaps, consciously or unconsciously, this cultural foundation passed through his