colored randomly concentric 12-sided dodecagons ideal as a cheerful and colorful background

abstract shapes colorful patterns geometric design happy joyful lively math multitude optimism playful random regular vibrant visual twelvesided dodecagon 12 dodecahedron polyhedron twelve geometry shape polygon concentric repetition multicolor multicolored color colors many variegated polychromatic multi colored backgrounds texture background backdrop backdrops pattern textur randomness entropy stochasticity randomly red blue green yellow purple cyan orange magenta pink brown 2d