Affiche fonctionnelle Géométrie primaire Bauhaus

Top-down photograph of a printed poster lying flat on a dark charcoal matte surface, the poster fills nearly the entire 4:5 frame with only a thin natural border visible on all sides. The poster depicts: vintage cream poster paper with subtle age tone. A composition based on a strict geometric grid — a large solid red circle overlapping a yellow equilateral triangle in the center-left of the poster, a thick black diagonal line cutting across the frame from lower-left to upper-right bisecting both shapes, thin blue horizontal bars creating a sense of balance and rhythm in the right third. Clean Universal sans-serif typography reading "FORM UND FUNKTION" positioned in the lower quarter with precise geometric placement on the grid, black letters with exact even spacing. Primary colors only — red, blue, yellow, black on cream. Minimalist functional layout, primary geometric forms with mathematical precision, early modernism influence, Kandinsky and Moholy-Nagy aesthetic, Bauhaus school design principles, Bauhaus graphic design style --ar 4:5