Hello World!

W3Schools background image example.

The background image only shows once, but it is disturbing the reader!

The internal stylesheet embedded in the head of this page

<style>
body {
  background-image: url("include/images/img_tree.png");
  background-repeat: no-repeat;
}
pre {
    background-color: rgba(255, 255, 255, 0.5);
}
</style>