naive playful abstract forms. geometric posters in a fashionable retro-brutalist style.

abstract geometric design figure circle contemporary trendy oval naive retro brutalist playful wave brutal bauhaus shape form graphic simple poster set vector modern collection color background vintage flat pattern symbol funky minimalist unusual groovy paper minimal illustration curve wallpaper star funny brutalism psychedelic happy banner card collage decoration geometry colorful forms posters fashionable retro-brutalist style aesthetics swiss design