seamless background pattern, with swirls, lines, paint strokes and splashes, retro/vintage style, grungy

abstract art background black bright brush canvas circle cover design dots drawing element fabric fashion floral geometric graffiti graphic grunge grungy illustration ink interior lines modern old paint paper pattern pop poster print repeat retro retrovintage round seamless shape splash splashes stripes stroke strokes structure style swirl swirls textile texture vector vintage wallpaper watercolor waves white