<?
// Image type
header("Content-type: image/png");
//Switch command
switch (rand(1,16)){
case 1:
$image = "01.png";
break;

case 2:
$image = "02.png";
break;

case 3:
$image = "03.png";
break;

case 4:
$image = "04.png";
break;

case 5:
$image = "05.png";
break;

case 6:
$image = "06.png";
break;

case 7:
$image = "07.png";
break;

case 8:
$image = "08.png";
break;

case 9:
$image = "09.png";
break;

case 10:
$image = "10.png";
break;

case 11:
$image = "11.png";
break;

case 12:
$image = "12.png";
break;

case 13:
$image = "13.png";
break;

case 14:
$image = "14.png";
break;

case 15:
$image = "15.png";
break;

case 16:
$image = "16.png";
break;

}
// Creating the image
$image = imagecreatefrompng($image);
imagepng($image);
imagedestroy($image);
?>