naive bright playful squiggle seamless pattern on black. abstract matisse pattern in bright childish colors. messy graffiti

squiggle bold naive seamless pattern line scribble simple neon bright colorful abstract matisse texture brush grunge stroke geometric wallpaper modern shape background curve doodle wave design graphic playful organic boho hand 90s 80s 70s 60s messy groovy 1970s minimal hippie retro vintage print trendy contemporary funky aesthetic backdrop handdrawn kids black childish colors graffiti print backgrounds dryâ brushâ textures