"Klee's Dessau period is marked by a tendency to systematise and geomaetricise the picture surface." He uses black outlines. How the eye moves over the picture was important. This suggests the idea of rythm and movement. Klee's style changes when he "discovered that an even more subtle arrangement of form was possible using a technique similar to that of pointillism, which he referred to as "divisionist painting" A colored background is applied either in a cloud pattern or divided into rectangles and covered by a grid of dense dots of contrasting colors, giving the image depth and transparency. In these pictures the contrast between the colored ground and the pattern of dots results in an intense luminosity." It is at this time that Klee demonstrates that he has synthesized all the elements he has been painting. The Ad Parnassum is truly a masterpiece. "Ad Parnassum is the embodiment of Klee's aim to create a "work of great breadth based purely on its field of elements, it reference to objects, and its content and style" The seat on the mountain of the muses was, as is well known, denied to painting. In Klee's opinion, however, "polyphonic painting" was superior to music just because of the simultaneity of its theme. With the wealth of form and content contained in his pointillistic pictures, Klee attempted to place modern painting on an equal footing with other arts and sciences."(p79) In 1935 Paul had two major exhibitions in Bern and Basel. Then another one in Zurich in 1940. Shortly afterwards he died from scleroderma.