or download this
<table border="0" cellspacing="0" cellpadding="0">
<tr>
...
<td width="20px" height="20px" bgcolor="black"></td><td width="20px" h
+eight="20px" bgcolor="white"></td><td width="20px" height="20px" bgco
+lor="black"></td><td width="20px" height="20px" bgcolor="white"></td>
</tr>
</table>