psychedelic wavy background. 1960s-1970s hippie trippy .

psychedelic wavy background 1960s1970s hippie trippy design 1970s groovy 1960s doodle 70s 60s graphic seventies shapes surreal sixties illusion swirl wallpaper wave style cover retro vector poster abstract pop art curvy hallucinogen liquid fluid effect marbled grunge vintage colourful concept geometric hypnotic modern swinging trendy years illustration disco 70 039