ound:black'>&nbsp;</div></td>
            <td><div id='top_a' style='width:10px;height:30px;background:white'>&nbsp;</div></td>
            <td colspan=3><div id='a_sharp' style='width:10px;height:30px;background:black'>&nbsp;</div></td>
            <td><div id='top_b' style='width:10px;height:30px;background:white'>&nbsp;</div></td>
          </tr>
          <tr>
            <td><div id='bottom_c' style='width:10px;height:20px;background:white'>&nbsp;</div></td>
            <td><div id='right_bottom_c' sty