Set of Halloween Concepts. Vector Illustration. Orange Pumpkin and Spider Web, Witch Hat and Cauldron, Skull and Bones, Night Party. Trick or Treat. Shutterstock .eps vector - Set of Halloween Concepts. Vector Illustration. Orange Pumpkin and Spider Web, Witch Hat and Cauldron, Skull and Bones, Night Party. Trick or Treat. - ID: 297870776