abstract groovy background in autumn color palette

art text font circle brand brown organ design pattern line orange red number logo poster screenshot diagram pink abstract groovy background wavy stripes palette good backgrounds wallpaper social media templates posters prints cards cover brochure elegant color shape 1960s 1970s 60s 70s autumn backdrop banner cartoon colorful concept creative decor decoration decorative fall geometric graphic hippie invitation modern optical print psychedelic retro seventies sixties style template texture trendy trippy vector vintage wave