[php] Image GD... whats wrong with this?

programming
1

http://www.templarian.com/misc/rpg/pic-from-colors.php
(see it in action. currently its only showing a black 20x20box).

<?php
$string = <<<COLORS
0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x00FF00,0x00FF00,0x00FF00,0x00FF00,0x00FF00,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x00FF00,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x00FF00,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x00FF00,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x00FF00,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x00FF00,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x00FF00,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x00FF00,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x00FF00,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x00FF00,0x00FF00,0x00FF00,0x00FF00,0x00FF00,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x990000,0x00FF00
COLORS;

$colors = explode(",",$string);

$im = @imagecreate(20, 20) or die("Cannot Initialize new GD image stream");

$index=0;
for($y=0;$y<20;$y++) {
    for($x=0;$x<20;$x++) {
        $color = substr($colors[$index],2,2).substr($colors[$index],4,2).substr($colors[$index],6,2);
        print($color." ");
imagesetpixel($im,$x,$y,imagecolorallocate($im,"0x".substr($color,0,2),"0x".substr($color,2,2),"0x".substr($color,4,2)));
print("imagesetpixel(\$im, $x, $y, 0x".substr($color,0,2).","."0x".substr($color,2,2).","."0x".substr($color,4,2).")<br>");
        $index++;
    }
}
imagejpeg($im,"tile/test.jpg",100);
?>

norkrev made a version but for .gif and i was trying to change it.