use warnings;
use strict;
use Tk;

my $hoehe = 80;
my $breite = 600;
my $hauptfenster = Tk::MainWindow->new();
my $fensterL = $hauptfenster->Canvas(
    -height     => $hoehe,
    -width      => $breite / 4,
    -background => 'chocolate',
    -relief     => 'groove',
    -bd         => 3
)->pack(
    -side       => 'left',
    -fill       => 'both',
    -expand     => 1
);
my $fensterM = $hauptfenster->Frame(
    -height     => $hoehe,
    -width      => $breite / 4,
    -background => 'chocolate1',
    -relief     => 'groove',
    -bd         => 3
)->pack(
    -side       => 'left',
    -fill       => 'both',
    -expand     => 1
);
my $fensterR = $hauptfenster->Frame(
    -height     => $hoehe,
    -width      => $breite / 4,
    -background => 'chocolate2',
    -relief     => 'groove',
    -bd         => 3
)->pack(
    -side       => 'left',
    -fill       => 'both',
    -expand     => 1
);
my $fenster = $hauptfenster->Frame(
    -height     => $hoehe,
    -width      => $breite / 4,
    -background => 'chocolate3',
    -relief     => 'groove',
    -bd         => 3
)->pack(
    -side       => 'left',
    -fill       => 'both',
    -expand     => 1
);

$fensterL->packPropagate(0);
$fensterM->packPropagate(0);

my $anmeld = $fensterL->Label(
    -text => "Anmeldename"
)->pack(
    -side   => 'top',
    -expand => 0,
    -fill   => 'none'
);
my $test = $fensterM->Button(
    -text => "Button"
)->pack(
    -expand => 1, 
    -fill   => 'none'
);

MainLoop();