Shadow Only (please read the rules)

Shadows seem to be nearly everywhere. Find and photograph an interesting and artistic shadow BUT ONLY the shadow and not the thing that casts the shadow. For example, a curved vase shadow (but NOT the vase). The shadow of a tree (but NOT the tree). For interest, find shadows on wals, on sidewalks AND walls, on stairs, and on other objects. -+- TIP The shadow(s) should work in harmony with the background to create a pleasing result. Just remember, the photo must NOT include the thing that casts the shadow.