@FXML
 private void handleInstructionsAction(ActionEvent event) {
   instructions();
   Stage owner = (Stage) ((Node) event.getSource()).getScene().getWindow();
   Dialog.showInfo(
       "ΟΔΗΓΙΕΣ ΠΑΙΧΝΙΔΙΟΥ!",
       instructionsText,
       owner,
       new EventHandler<ActionEvent>() {
         @Override
         public void handle(ActionEvent t) {
           // Keep running
         }
       });
 }