Pop art is an art movement that originated in England in the 1950's but became best known in the United States during the 1960's. Many pop artists use common, everyday, "nonartistic" commercial illustrations as the basis of their style or subject matter. Many of the works these artists produce are satirical or playful in intent. However, their uses of forms and themes from mass culture are intended to devalue what they consider to be unnecessarily difficult and private aspects of traditional fine art forms. Some pop artists are fascinated by the bold, simple patterns of commercial illustrations. For example, Andy Warhol made exact painted copies of soup cans, repeating them over and over in the same painting.