[% FILTER null;
        USE im = GD.Image(100,100);
        # allocate some colors
        black = im.colorAllocate(0,   0, 0);
        red   = im.colorAllocate(255,0,  0);
        blue  = im.colorAllocate(0,  0,  255);
        # Draw a blue oval
        im.arc(50,50,95,75,0,360,blue);
        # And fill it with red
        im.fill(50,50,red);
        # Output binary image in PNG format
        im.png | stdout(1);
       END;
    -%]

    [% FILTER null;
        USE im   = GD.Image(100,100);
        USE c    = GD.Constants;
        USE poly = GD.Polygon;

        # allocate some colors
        white = im.colorAllocate(255,255,255);
        black = im.colorAllocate(0,  0,  0);
        red   = im.colorAllocate(255,0,  0);
        blue  = im.colorAllocate(0,  0,255);
        green = im.colorAllocate(0,  255,0);

        # make the background transparent and interlaced
        im.transparent(white);
        im.interlaced('true');

        # Put a black frame around the picture
        im.rectangle(0,0,99,99,black);

        # Draw a blue oval
        im.arc(50,50,95,75,0,360,blue);

        # And fill it with red
        im.fill(50,50,red);

        # Draw a blue triangle
        poly.addPt(50,0);
        poly.addPt(99,99);
        poly.addPt(0,99);
        im.filledPolygon(poly, blue);

        # Output binary image in PNG format
        im.png | stdout(1);
       END;
    -%]