autumn-themed doodle of a whimsical hedgehog with leaves and umbrella, perfect for a banner concept

autumn themed doodle whimsical hedgehog leaves umbrella perfect banner design concept fall seasonal artistic creative charming adorable foliage rainy cute autumnal sketch drawn artwork illustration cozy festive fallen shelter canopy decorative quaint leafy precipitation pretty season autumnish designing visual inspiration stylish elegant drawings autumnthemed decor atmosphere styling foliagefocused ai generated