pink psychedelic squate background. retro 70s 90s 00s style . groovy waves texture for textile, paper, fabric

background 70s swirl pattern groovy psychedelic wavy wallpaper abstract 60s backdrop liquid illustration graphic cover color wave vector modern retro curve hippie poster geometric colorful banner trendy lines creative curvy rainbow trippy 90s decoration bright drawing 1960s textile decorative 1970s placard shapes fun 1970 2000s pink gradient square simple