$mainWindow->AddButton(
  -name => 'b2',
  -text => 'label 1 hide',
  -pos => [150, 0],
  -onClick => sub { 
    $mainWindow->label1->Animate( 
      -show => 0, 
      -time => 600,
      -direction => 'lr',
      -animation => 'roll',
    ); 
    
  },
);