#!/usr/bin/perl
use warnings;
use strict;
use Tk qw/tkinit DoOneEvent exit DONT_WAIT ALL_EVENTS/;

my $mw = tkinit;
$mw->Button(
    -text    => 'Test',
    -command => sub { print "Pushed\n" },
)->pack();

$mw->Button(
    -text    => 'Quit',
    -command => sub { Tk::exit(0) },
)->pack();

my $I;

while (1) {
    $mw->DoOneEvent( DONT_WAIT | ALL_EVENTS );
    if ( ++$I > 10000 ) {   #slows things down use 1 for max speed
        print '.';
        $I = 0;
    }
}