popart, halftone pattern, background. yellow and red, duotone ba

1950 1960 abstract backdrop background burst cartoon circle circular classic comic dots dotted duotone effect flecks free graphic half halftone illustration illustrationn lichtenstein pattern pixel pixelated pointilist pointillism pointillist popart prepress raster retro royalty screentone simple speckle speckled spots stipple tone vector warhol warhole yellow