Sent a pull request. I'm going for one of my classics, but Santa themed.

(Initially i was thinking about trying something with GPS to help Rudolph navigate. But compensating for doppler effects and time dilation of a sleigh going near the speed of light is way out of my league)

Edit: I'm not a native english speaker. There may be typos and wonky sentences. I'd appreciate if a native speaker could give it a quick look and fix the most obvious mistakes.