The shapes don't have to be circles!You can overlap any shapes you want to invent. "Spiraling Spheres“ Start with a 1” border in your sketchbook. Drawing pencil only(no color). Overlap circles (or other shapes) of graduated sizes, moving from smallest to largest (largest on top- draw it first) to create an illusion of movement toward you from the surface of the page. Fill the page with various sized trails (overlapping shapes).Shade beneath each overlapped shape to enhance the illusion of movement and depth. Createan interesting background or environment.