-overlapping
        {
        background-color: black;
        bottom: 1cm;
        height: 1cm;
        position: relative;
        }
        </style>
    </head>
    <body>
      <p>Test passes if there is a thick black stripe and <strong>no red</strong>.</p>

      <div id="red-overlapped"></div>

      <div id="black-overlapping"></div>

    </body>
</html>
