@FXML
 private void handleExitAction(ActionEvent event) {
   final Stage owner = (Stage) ((Node) event.getSource()).getScene().getWindow();
   Dialog.showYesNo(
       "ΕΞΟΔΟΣ ΕΦΑΡΜΟΓΗΣ!",
       "Θέλετε να κλείσετε την εφαρμογή;\n\n",
       owner,
       new EventHandler<ActionEvent>() {
         @Override
         public void handle(ActionEvent t) {
           try {
             owner.close();
           } catch (Exception ex) {
             System.out.println("wrong uri again ><");
             // TODO handle error loading stage
           }
         }
       },
       new EventHandler<ActionEvent>() {
         @Override
         public void handle(ActionEvent t) {
           // Keep running
         }
       });
 }
 @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
         }
       });
 }