expressive abstract doodle poster with playful minimalism and bold outlines

psychedelic design abstract expressive shapes playful motifs bold outlines flat colors minimalism whimsical topography colorful modern art contemporary graphic poster doodle minimalist creative artwork vibrant geometric artistic expression composition aesthetic patterns concept visual simplicity style doodles digital featuring bright organic curved lines define enhancing appeal spontaneous mark-making isolated figures add depth accompanied unpredictable capture attention generated