I create a gif file for display a chistmas tree. The tree.R contains my source code. I use ggplot to create the tree. The code is a little mess, since I do not have a brilliant statistical simulation process to create one. In the end of this file, I produce Weihnachtsbaum.gif with package animation.

The weihnachtsbaum.Rmd is the rmarkdown version of tree.R. The output weihnachtsbaum.html is stored it in the repository.
Anyone wants to create one could use and modify my R code if you don't mind my rough version. Hope everyone has a nice Xmas.