I was very thrilled watching all your Halloween videos so it has made me in a mood to set up my Christmas display and make a video of what's already up.
The arch is made of a ribbon LED light wrapped around a PVC tube which gives a kind of caterpillar effect. It's pre-programmed as a lot of things that are sold in France because things like lightorama are not findable here. :-(
You sure can do the same with a CCR : wrap it around the PVC and get the "madmiask's caterpillar effect" lol