Circle using Perl
The code:
use strict;
use warnings;
use SVG (-nocredits => 1, -inline => 1);
my $svg= SVG->new( width => 200, height => 200);
$svg->circle( cx => 100, cy => 100, fill => "#f37", r => 50);
print $svg->xmlify();
The generated SVG
<svg height="200" width="200" xmlns="http://www.w3.org/2000/svg" xmlns:svg="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
<circle cx="100" cy="100" fill="#f37" r="50" />
</svg>
The image: