<?php

$image = imagecreatetruecolor(600,600)
or die('Cannot create image');

$red = imagecolorallocate($image, rand(1,255), rand(1,255), rand(1,255));
imagefill($image, 0, 0, $red);


for($i=0;$i<50;$i++){
$red = imagecolorallocate($image, rand(1,255), rand(1,255), rand(1,255));
imageline($image, rand(1,500), rand(1,500), rand(1,500), rand(1,500), $red);
}

header('Content-type: image/png');

imagepng($image);

imagedestroy($image);

?>