a playful halloween backdrop showcases whimsical witches, wizards, and goblins against a vivid orange-green gradient with eerie

halloween holiday background witches wizards goblins silhouettes spooky orange green gradient fantasy whimsical twilight trees bats eerie art monsters autumn seasonal decoration creative mystical pumpkins haunted celebration dark magical night fright season vibrant colors fun landscape design festive nature shadows witchcraft legends folklore traditional rituals scenes playful backdrop showcases vivid orange-green black tree