//graphicGUI is the ID of AnchorPane in FXML

graphicGUI.getChildren().clear();

//============= graphicGrid ================

                                    graphicGrid = new GridPane();

                                    String available;

                                    graphicGrid.setPadding(new Insets(2, 2, 2, 2));

                                    //Setting the vertical and horizontal gaps between the columns
                                    graphicGrid.setVgap(5);
                                    graphicGrid.setHgap(5);

                                    graphicGrid.setAlignment(Pos.CENTER_LEFT);

                                    //Set Column Constraints
                                    ColumnConstraints col1 = new ColumnConstraints();
                                    col1.setPercentWidth(14);
                                    ColumnConstraints col2 = new ColumnConstraints();
                                    col2.setPercentWidth(16);
                                    ColumnConstraints col3 = new ColumnConstraints();
                                    col3.setPercentWidth(14);
                                    ColumnConstraints col4 = new ColumnConstraints();
                                    col4.setPercentWidth(14);
                                    ColumnConstraints col5 = new ColumnConstraints();
                                    col5.setPercentWidth(14);
                                    ColumnConstraints col6 = new ColumnConstraints();
                                    col6.setPercentWidth(14);
                                    ColumnConstraints col7 = new ColumnConstraints();
                                    col7.setPercentWidth(14);
                                    graphicGrid.getColumnConstraints().addAll(col1, col2, col3, col4, col5, col6, col7);

                                    //Set Row Constraints
                                    int maxRow = 0;
                                    for(int i = 0; i < 7; i++) {
                                        if (airport.getParking().get(i + 1) != null) {
                                            if( airport.getParking().get(i+1).size() > maxRow){
                                                maxRow = airport.getParking().get(i+1).size();
                                            }
                                        }
                                    }

                                    for(int i = 0; i <= maxRow; i++){
                                        RowConstraints r = new RowConstraints();
                                        r.setPercentHeight(graphicGUI.getHeight() / maxRow);
                                        graphicGrid.getRowConstraints().add(r);

                                    }

                                    //Set 1st Line with the names of parking categories
                                    Label label = new Label("Gate");
                                    label.setStyle("-fx-font-weight: bold;");
                                    graphicGrid.add(label, 0, 0);
                                    GridPane.setHalignment(label, HPos.CENTER);

                                    label = new Label("PassGate");
                                    label.setStyle("-fx-font-weight: bold;");
                                    graphicGrid.add(label, 1, 0);
                                    GridPane.setHalignment(label, HPos.CENTER);

                                    label = new Label("Zone A");
                                    label.setStyle("-fx-font-weight: bold;");
                                    graphicGrid.add(label, 2, 0);
                                    GridPane.setHalignment(label, HPos.CENTER);

                                    label = new Label("Zone B");
                                    label.setStyle("-fx-font-weight: bold;");
                                    graphicGrid.add(label, 3, 0);
                                    GridPane.setHalignment(label, HPos.CENTER);

                                    label = new Label("Zone C");
                                    label.setStyle("-fx-font-weight: bold;");
                                    graphicGrid.add(label, 4, 0);
                                    GridPane.setHalignment(label, HPos.CENTER);

                                    label = new Label("General");
                                    label.setStyle("-fx-font-weight: bold;");
                                    graphicGrid.add(label, 5, 0);
                                    GridPane.setHalignment(label, HPos.CENTER);

                                    label = new Label("Long");
                                    label.setStyle("-fx-font-weight: bold;");
                                    graphicGrid.add(label, 6, 0);
                                    GridPane.setHalignment(label, HPos.CENTER);

                                    for(int i = 0; i < 7; i++) {

                                        if( airport.getParking().get(i+1) != null){

                                            int row = airport.getParking().get(i+1).size();
                                            for (int j = 1; j <= row; j++) {

                                                if(airport.getParking().get(i + 1).get(j - 1).getStatus().equals("parked")){
                                                    available = "-fx-background-color: red";
                                                }
                                                else{
                                                    available = "-fx-background-color: green";
                                                }

                                                VBox vbox = new VBox();
                                                vbox.setStyle(available);
                                                vbox.setAlignment(Pos.CENTER);


                                                Text text = new Text("  " + airport.getParking().get(i+1).get(j-1).getParkingSeatID()+ "  ");

                                                vbox.getChildren().add(text);

                                                graphicGrid.add(vbox, i, j); //  (child, columnIndex, rowIndex)


                                            }

                                        }

                                    }

                                    graphicGrid.setMinWidth(480);
                                    graphicGrid.setMaxWidth(480);
                                    graphicGrid.setMinHeight(286);
                                    graphicGrid.setMaxHeight(286);


                                    graphicGUI.getChildren().add(graphicGrid);