function gfx($random_num) {


    global $prefix, $db, $module_name;


    require("config.php");


    $datekey = date("F j");


    $rcode = hexdec(md5($_SERVER[HTTP_USER_AGENT] . $sitekey . $random_num . $datekey));


    $code = substr($rcode, 2, 6);





    // constants (variables) declaration


    $circles=5; 


    $width=100; 


    $height=20; 





    // initializing with random image generation


    Header("Content-type: image/jpeg");


    $image = ImageCreate($width,$height);





    // limiting RGB outputs to range 128:255 [absolute range : 0:255] //   


    for ($i=1;$i<=$circles;$i++) { 


        $randomcolor = imagecolorallocate ($image , rand(128,255),rand(128,255),rand(128,255)); 


        imagefilledellipse($image,rand(0,$width-10),rand(0,$height-3),rand(20,70),rand(20,70),$randomcolor); 


    } 


    // limiting RGB outputs to range 192:255 [absolute range : 0:255] //


    for ($cnt=0; $cnt<12; $cnt++) {


        $text_color = ImageColorAllocate($image, intval(rand(192,255)), intval(rand(192,255)), intval(rand(192,255)));


        ImageArc($image,($cnt*8),10,intval(rand(15,30)),intval(rand(15,30)),0,360, $text_color); 


    }


    // limiting RGB outputs to range 0:63 [absolute range : 0:255] //


    for ($idx=0; $idx<24; $idx++) {


        $text_color  = ImageColorAllocate($image, intval(rand(0,63)), intval(rand(0,63)), intval(rand(0,63)));


        $text_color1 = ImageColorAllocate($image, intval(rand(0,63)), intval(rand(0,63)), intval(rand(0,63)));


        ImageString ($image, intval(rand(1,2)), 9+($idx*14), 2, substr($code,$idx,1), $text_color);


        ImageString ($image, intval(rand(1,5)), 11+($idx*14), 2, substr($code,$idx,1), $text_color1);


    }


    // outputting the image


    ImageJPEG($image, '', 100);


    ImageDestroy($image);


    die();


}