Flying bats silhouettes over colorful swirling background in animation

flying bats silhouettes over colorful swirling background animation dynamic spooky night motion creatures wildlife darkness halloween eerie shadows nocturnal spooky season fantasy nature flight batsman atmospheric whimsical mysterious vibrant swirling colors ghostly haunting silhouette art movement dynamic background abstract vector design artistic colorful background night sky animal wildlife art spooky night fantasy art creative visual motion graphics digital art halloween decor seasonal