Cat image: position: absolute; bottom: 0px; right: 0px;
This positions the element with respect to the last "containing element" (called an ancestor) that also has a position style that was not "static". In this case, our original HTML and CSS did not set the position for div id="left" (container for the img element) so, the image is positioned with respect to the <body>. Unlike "fixed" position, the image will scroll with the browser's content.