abstract blue jack-o-lantern with swirling smoke. concept of halloween, spooky decorations, eerie

halloween spooky eerie atmosphere pumpkin jackolantern blue abstract illustration smoke swirling decoration holiday scary ghostly festive haunting mysterious spectral creepy autumn fall october celebration fog artistic seasonal event night dark fantasy design concept unsettling ghoulish macabre chilling supernatural creative surreal enchanting digital art background backdrop wallpaper banner texture ai generated