Yes Building a rainbow gate is a wedding ceremony, which is made of arched balloons. If funds permit, anyone can build it without any restrictions, so civil servants can build a rainbow gate when they get married. Materials needed to build rainbow doors: Rainbow doors are made of balloons, nylon wires and PVC pipes. First, the colored ball chains are woven, and then PVC pipes are inserted in the middle of the colored ball chains, and the ball chains are arranged in an arch shape to form the rainbow door. Both ends of the PVC pipe are inserted into the base.