dotted, polka dot, pop-art pattern seamlessly repeatable

1950s 1960s 50s 60s 70s abstract art backdrop background blank circle classic continuity decor dot dotted duo duotone effect empty flecked halftone lichenstein lichtenstein pattern pointillism pointillist polka polkadot pop popart red repeat repetition scrapbook seamless shape speckled spot spotted spotty texture tone vector wallpaper warhol