groovy boo - square 70s hippie style poster for halloween party holiday. furry monster growls at the disco with a mirror

boo groovy psychedelic monster banner 70s distorted halloween pumpkin background fall post package groove holiday mysterious horror mystery 60s 90s scary cute card illustration party cartoon autumn poster retro vintage vector template sweet witch creepy treats fun spell spooky happy orange spook greeting fluffy checkered font roar backdrop design dance