$stars = imagecreatefrompng("stars.png");
$gradient = imagecreatefrompng("gradient.png");
imagecopymerge($stars, $gradient, 0, 0, 0, 0, 256, 256, 60);
header('Content-type: image/png');
imagepng($stars);
imagedestroy($stars);
imagedestroy($gradient);
?>