Do a 'View | Source' to see the code for this web page.

In the newer versions of Internet Explorer, press the F12 key to open the Developer Tools, then click on the "Script" tab to see the code. (Unless you know what you are doing, don't do anything else!)

Now to add another line.
And yet another.

Type a little extra text to be sure you get at least two lines of writing to show on the web page.
This will let you see how paragraph commands block text, and it will allow you to try something later.

This text does not have to be so long.

One two three four five.
One  two       three   four                           five.

(now you can close the Developer Tools.)