These geometric Christmas light covers are the work of the "playful.geometer" at Flickr. The five different covers are based on the five shapes of the Platonic Solids. The lovely patterns on each of the solids are "kaleidoscoped" fractal images. I like the paper lantern effect these have when they are lit up. Templates for each of the five are available here. If you are interested in creating your own decorative patterns, a educational math website has some blank Platonic Solid templates available here.