#!/usr/bin/perl
use warnings;
use strict;
use Tk;

my $mw    = new MainWindow;
$mw -> geometry ("820x780");
my @files = <*gif>;

# make one Photo object and one Button and reuse them.
my $shot = $mw->Photo(-file => "$files[0]"); #get first one
my $button = $mw->Button(-image => $shot)->pack();

for my $image (@files)
{
   $shot->blank; #clear out old image
   $shot->read($image);
   $mw->update;
   select(undef, undef, undef, .1);
}
$mw->MainLoop;