@Override
    public void initialize(URL url, ResourceBundle rb) {

        ObservableList<String> spaceOptions
                = FXCollections.observableArrayList(
                        " ",
                        "Red Star",
                        "Red Moon",
                        "Red Gear",
                        "Red Planet",
                        "Blue Star",
                        "Blue Moon",
                        "Blue Gear",
                        "Blue Planet",
                        "Yellow Star",
                        "Yellow Moon",
                        "Yellow Gear",
                        "Yellow Planet",
                        "Green Star",
                        "Green Moon",
                        "Green Gear",
                        "Green Planet"
                );

        for (int row = 0; row < 31; row++) {
            for (int column = 0; column < 31; column++) {
                if (row >= 13 && row <= 17 && column >= 13 && column <= 17) {
                    boardGrid.add(new Label(), column, row);
                } else if (row % 2 == 0) {
                    if (column % 2 == 0) {
                        ComboBox spaceComboBox = new ComboBox(spaceOptions);
                        
                        boardGrid.add(spaceComboBox, column, row);
                    } else {
                        ToggleButton vbarrier = new ToggleButton();
                        vbarrier.getStyleClass().add("vbarrier");
                        boardGrid.add(vbarrier, column, row);
                    }
                } else if (column % 2 == 0) {
                    ToggleButton hbarrier = new ToggleButton();
                    hbarrier.getStyleClass().add("hbarrier");
                    boardGrid.add(hbarrier, column, row);
                } else {
                    Label cornerlabel = new Label();
                    cornerlabel.getStyleClass().add("cornerlabel");
                    boardGrid.add(cornerlabel, column, row);
                }
            }
        }
    }