?Why don?t you paint some cows? was the suggestion of art dealer Ivan Karp. Consequently Warhol began his series of cow screenprints. Warhol recalled that ?when he [Ivan] saw the huge cow heads ? bright pink on a bright yellow background ? that I was going to have made into wallpaper he was shocked?. This was the first of several wallpaper designs that Warhol created. The repetition in wallpaper is an extension of his fascination with the repeated image in his paintings. Warhol hung paintings on his vibrant cow wallpaper at his 1970 retrospective at the Whitney Museum of American Art: an idea he would continue with in exhibitions such as his 1974 Paris exhibition of Chairman Mao portraits on Mao wallpaper.