This will show a 50x300 white bar filled with blue.
#!/usr/bin/perl
use strict;
use warnings;
use Image::Magick;
my $width = 50;
my $height = 300;
my $fill = 150;
my $image = Image::Magick->new(size => $width."x".$height);
$image->Read("xc:white");
$image->Draw(primitive => "Rectangle",
fill => "blue",
stroke => "blue",
strokewidth => 4,
points => "0,$height $width,$fill");
$image->Write("progress.png");
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