$x = 20;
$white=$img->colorAllocate(255,$x*2,255);
$img->line(0,0,50,50,$white);
$white = $img->colorAllocate(255,$x*10,150);
$img->line(50,50,150,250,$white);


##</code><code>##

$blue = $img->colorAllocate(0,0,25);
$img->colorDeallocate($blue);
$blue = $img->colorAllocate(0,0,25*$teller);