Camille Graeser, who was a key member of the circle of Zurich Concrete artists, described his artistic program in 1944: “Concrete implies a strictly logical approach to the creation and design of works of art, which have their own intrinsic laws. Concrete implies the exclusion of all unconscious elements. Concrete implies purity, law and order.” korrelative konkretion is made up of a double row of squares in three sizes, in the ratio of 1:9:25. By interchanging the outside and inside colors, the vertically arranged large squares interrelate in such a way that both rows include the complementary juxtaposition of colors as well as the contrast between black and white. Thanks to the way in which the small squares of color appear to move further away and increase or decrease in number, the large squares are brought horizontally into a mathematically logical order.