1970 good vibes geometric background. warm retro abstract wallpaper, 70s triangles and cute daisy flower banner

1970 1970s 70s background retro abstract geometric triangle geometry groovy hippie hippy vibe positive warm old oldschool psychedelic bright mushroom motives vector wallpaper illustration shapes pattern seamless banner fun nostalgia nostalgy memories childhood 60s 1960 aesthetic summer autumn fall 1960s art print simple cozy texture polygon