Código PHP:
switch($n)
{
case case 1: echo "<td bgcolor='#0033FF'><font size='2' face='Verdana, Arial, Helvetica, sans-serif'><div align='center'><strong> </strong></div></font></td>";
break;
case case 2: echo "<td td bgcolor='#FFFF00'><font color='#FFFF00' size='2' face='Verdana, Arial, Helvetica, sans-serif'><div align='center'><strong>E</strong></div></font></td>";
break;
case case 3: echo "<td td bgcolor='#CC9933'><font size='2' face='Verdana, Arial, Helvetica, sans-serif'><div align='center'><strong></strong></div></font></td>";
break;
}