Play with the concepts you just learned!
Type an URL with differents formats like: (http://example.com, www.example.com, example.com)
Try other types of URL like mailto:email@example.com or ftp://192.168.0.1 and see if they are turned into links.
See the generated HTML. Even if you don't know HTML, try to understand what's happening. Go wild!
Go to the next lesson when you're ready.