           #span1
            {
                float: right;
            }
            #span2, #span3
            {
                float: left;
            }
            #span3
            {
                background: blue;
                clear: both;
            }
        </style>
    </head>
    <body>
        <p>Test passes if the blue box is below the orange boxes.</p>
        <div>
            <span id="span1"></span>
            <span id="span2"></span>
            <span id="span3"></span>
       