old-school funky rainbow colored striped square poster set. collection of geometric rainbow tracks inspired by hippie

rainbow retro vintage groovy set poster abstract colours collection stripes bundle lines bold 70s vector template funky background colorful modern illustration decoration shape banner design 60s motivational happiness flyer minimalism geometry adjustable positive print wave striped element old 1970s card placard y2k pride iridescent geometric path 1960s square lgbt lgbtq