I did this mani a few weeks back but I somehow lost the pictures, but thank God I finally found them trying to organize all the pictures on our computer.
Thumb: Spider web; Pointer: simple spider; Middle: "Boo!" Ring: Random dots (which ended up looking like some kind of scary face =)); Pinky: Bats
Base Coat: OPI Nail Envy
Base Color: Orly White Tips
Design: Black acrylic paint
Top Coat: Seche Vite