#!/usr/bin/perl

use GD;
# lifted from GD.pm synopsis...
$im = new GD::Image(100,100);
$white = $im->colorAllocate(255,255,255);
$black = $im->colorAllocate(0,0,0);       
$red = $im->colorAllocate(255,0,0);      
$blue = $im->colorAllocate(0,0,255);
$im->transparent($white);
$im->interlaced('true');
$im->rectangle(0,0,99,99,$black);
$im->arc(50,50,95,75,0,360,$blue);
$im->fill(50,50,$red);

# Important bit:

print "Content-type: image/png\n\n";

binmode STDOUT;
print $im->png;

exit(0);