Closure
Skopje is a poster designed by Fons Hickmann for an international competition with a purpose of celebrating the competition’s 10th anniversary in 2017. Fons Hickmann had used the closure of adhesive yellow strips to create a red star shape. The colors represent the Macedonian flag.

Proximity
Poster designed by Boris Bućan for Zagreb Symphony Orchestra and Chorus RTZ in 1986. He had altered the lines close together to create shapes of human figures by using proximity.

Televizija Zagreb) (Poster for a performance at Lisinski Concert Hall, Zagreb), 1986
Addition interesting work (combination of different Gestalt principles)
Print by Larry Carlson. This piece/poster/artwork is super interesting because I think he had used proximity and closure to create this trippy, illusion effect of two women hugging each other.
