Gestalt Figure or Ground

Man profile or ducks in the lake?

Gestalt is a psychology term which means "unified whole". It refers to theories of visual perception developed by German psychologists in the 1920s. These theories describe how people tend to organize visual elements into groups or unified wholes when certain principles are applied. These principles are: similarity, continuation, closure and proximity. The eye differentiates an object form and its surrounding area.
A form or shape is naturally perceived as figure (object), while the surrounding area is perceived as ground (background).Using figure/ground relationships I created this picture that either you see a profile of a man or you see two ducks swimming in the water of a lake.