pop art, polka dots, circles halftone, comic effect pattern. seamlessly repeatable

1960s 60s 70s 80s andy art circle circles comic cover culture dot dots duotone effect half halftone lichenstein lichtenstein pattern pointillism pointillist points polka polkadots pop popart poster red repeat repeatable repetition repetitive retro seamless speckle spot stipple stippling tileable tone vector vintage warhol warhole yellow