use strict;
use warnings;
use GD;
use GD::Graph::bars;

my $img_width = 288;
my $img_height = 216;
my $number_of_hours = 24;

my $img = GD::Image->new($img_width, $img_height);
my $gifdata = $img->gifanimbegin(1,0);

foreach my $hour (0..$number_of_hours-1) {
       my @h = CreateHistogram($hour);
       my @labels = 0..79;
       my @data = (\@labels, \@h);
       my $graph = GD::Graph::bars->new($img_width,$img_height);
       $graph->set(    title   => "HISTOGRAM HOUR $hour" );
       my $gd = $graph->plot(\@data);
       $gifdata .= $gd->gifanimadd;

       open(FIL, ">image_$hour.gif");
       binmode FIL;
       print FIL $gd->gif;
       close FIL;
       }
$gifdata .= $img->gifanimend;

open(GIF,">image.gif");
print GIF $gifdata;
close GIF;

exit;

sub CreateHistogram {
# stuff to create a histogram
}