An abacus casts a strong shadow on a white wall.
An abacus on a brown wood desktop in a room by a window. Lighting from behind the viewer is creating a very strong shadow of the abacus on the white wall to the right of the window. The abacus and desktop shadow is cast 50% to the right of the abacus. The abacus has a blond wood base and frame. All the sliding beads are slid to the right of the ten bars. The beads are as follows: from the top color down; there is black, red, bare wood, green, yellow, black, red, bare wood, green, and yellow on the bottom. In the top left behind the abacus and desktop is the bottom of a window frame with glass that looks out to a back porch post and yard.