<?php
$bg = "lightyellow";
echo "<table>";
for($j=1;$j<8;$j++)
{
	if($bg == "lightblue") {
		$bg = "lightblue";
	}else{
		$bg = "lightyellow";
	}
	echo "<tr><td bgcolor={$bg}>row #$j</td></tr>";
}
echo "</table>";
?>