Christmas in the CLI, because that's where I feel most at home.
Via cURL:
curl https://github.com/bryandph/MerryBashMas/master/christmas.sh | bash
Via Wget:
wget -qO- https://github.com/bryandph/MerryBashMas/master/christmas.sh | bash
Git clone and execute:
git clone https://github.com/bryandph/MerryBashMas && cd ./MerryBashMas && bash christmas.sh