acid wave rainbow line backgrounds in 1970s 1960s hippie style. y2k wallpaper patterns retro vintage 70s 60s groove

retro y2k frame funky rainbow 70s background pattern art illustration vector wavy 60s design graphic psychedelic abstract border card template curve layout 1970 poster vintage wallpaper 1960 colour fun seventies sixties color geometric print cover wave acid drawing backdrop banner hippie swirl liquid modern 70 60 trippy groovy vibe