I intended it as a genuine answer. Sorry if it appeared a bit snarky.

To expand a bit: With css, you can specify a background image to any document element. Something like this, where the url serves to identify you:

    div.foo {
      background-image: url('https://example.com/bar.png?t=deadbeef')
    }

But as zeroimpl says in a cousin post, you can do it directly with an image tag, no css needed.