GitHub is where i store most of my scripts, having a readme file for each repository is nice, but the default “look” could be better. The language used on GitHub is Markdown. So, the only thing you need is to understand Markdown, or use a editor.

Online Markdown Editor

Here is the one I use

https://dillinger.io/

On the right side you can see the preview and on the left side you can see the markdown language, pretty easy IMHO

/mike