This is a first-level header

This is a second-level header

Here is a paragraph of text.
This is the same paragraph, but a new line started because of the br tag.

Here is a second paragraph. Note that the gap between this paragraph and the previous one is larger than the gap caused by the br tag.

Note how the amount of space between words in the source makes no difference to how the text is rendered in the browser.

Here's another second-level header...

...and a third-level header

Here's some big red text and here's some small blue text. Here's some bold and italic text.