d>Alpha level</td>
                        <td> <input id="alpha" type="text" value="0.5"></td>
                    </tr>
                </tbody>
            </table>
            <p>
            <input id="lighting" type="checkbox" checked="">
            <label for="lighting">Use lighting</label>
            <p>(Use cursor keys to spin the box and Page-Up/Page-Down to zoom out/in)
            <p>
            <strong>Directional light</strong>
            <table>
                <tbody>
                   