If you want to see examples, look at the tutorial: https://orgmode.org/worg/org-...

If you want to see examples, look at the tutorial:

As for the source of that page, look at the Worg Maintenance section at https://orgmode.org/worg/

I haven't edited them yet, but I believe Worg is mostly org files on a Git repository - so you can clone it and see the source of all articles there.