flat style collection of autumn s mushroom, pumpkin, leaf, ghost, candle. vibrant, playful of fall and

autumn collection flat leaf october line art style mushroom pumpkin ghost candle vibrant playful design fall halloween vector illustration isolated white background set seasonal decoration nature harvest colorful thanksgiving festive graphic cozy warm foliage celebration squash acorn berries star anise drawing cute whimsical decor icon doodle sticker hand drawn september