 Under the impression of his military service he created the painting "Trauerblumen" (Velvetbells) in 1917, which, with its graphical signs, vegetal and phantastic shapes, is a forerunner of his future works, harmonically combining graphic, color and object.For the first time birds appear in the pictures, such as in "Blumenmythos" (Flower Myth) from 1918, mirroring the flying and falling planes he saw in Gersthofen, and the photographed plane crashes.In the 1918 watercolor painting "Einst dem Grau der Nacht enttaucht", a compositional implemented poem, possibly written by Klee, he incorporated letters in small, in terms of color separated squares, cutting off the first verse from the second one with silver paper.