Here's the usual contents of the page ...
It's a series of paragraphs, just as you'd expect.
We specified a background color and margins, so the boxes would stand out.
There would probably be a lot of them, but we're not going to bother. Still, we're going to have one that's wide enough to actually see the edges of the box.
And here is a narrow note on the right side. Try adjusting the size of your browser window, both wider and narrower, and see how the widths adjust.