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 * [**C**: _Rewriting the cat command from scratch_](https://learnto.computer/screencasts/bsd-cat) [video]
 * [**Go**: _Visualize your local git contributions with Go_](https://flaviocopes.com/go-git-contributions/)
 * [**Go**: _Build a command line app with Go: lolcat_](https://flaviocopes.com/go-tutorial-lolcat/)
+* [**Go**: _Building a cli command with Go: cowsay_](https://flaviocopes.com/go-tutorial-cowsay/)
 * [**Nim**: _Writing a stow alternative to manage dotfiles_](https://xmonader.github.io/nimdays/day6_nistow.html#cid16)
 
 #### Build your own `Database`