A black and white design on the wall helps you identify twelve possibilities:

A reenactment of old films.
A rectangular piece of cardboard.
A manuscript in a bound volume.
A poison pen in a bottle.

A clean table with a refined finish.
A leather bench.
An issue of the avant-garde review.
Two lamp posts, one on each wall.

The clear glass ocean.
The deep blue sky.
The snow is shadow.
The ground is firm.