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#!/usr/local/bin/perl -w
use Tk;
use strict;
my $str = "AaBbCcDdEeFfGgHhIiJjKkLlMmNnOoPpQqRrSsTtUuVvWwXxYyZz0123456789";
my $mw = MainWindow->new;
my $lframe = $mw->Frame->pack(-fill => 'both', -side => 'left', -expand => 1);
my $entry = $mw->Entry(
-textvariable => \$str,
-width => 12,
-font => "{Comic Sans MS} 72",
-relief => 'raised',
-highlightthickness => 0,
)->pack(-expand => 1, -fill => 'x', -side => 'left');
my $repeat_id = $mw->repeat(300, \&shift_banner);
MainLoop;
sub shift_banner {
my $newstr = substr($str, 1) . substr($str, 0, 1);
$str = $newstr;
}
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