Neoplasticism
Theory for the art which was delivered by Mondrian in late 1910 and decisively influenced the work of both, himself and a number of his "fans" like Van Doesburg. Its basic principles was that the art must be completely abstract, and that only the right angles in horizontal and vertical positioning and the simple, primary colors (with the addition of white, black and gray) should be used by painters (De Stijl).