Change colors using one button javafx - button

Question

How should I use my Buttons(red and blue).
Got four buttons on my pane. Two of them to draw the shapes circle and square on to the pane, and two to color them with either red or blue.
I want the color Buttons to only paint the last shape Button(Circle1 or Square) I clicked on.
Any suggestions?
public void start(Stage primaryStage) {
HBox hBox = new HBox();
Button circle = new Button("Circle");
Button square = new Button("Square");
Button red = new Button("Red");
Button blue = new Button("Blue");
hBox.getChildren().addAll(circle, square, red, blue);
Rectangle Square = new Rectangle();
square.setOnAction(e -> {
Square.setX(200);
Square.setY(200);
Square.setHeight(75);
Square.setWidth(75);
});
Circle Circle1 = new Circle();
red.setOnAction(e -> {
Square.setFill(Color.RED);
Circle1.setFill(Color.RED);
});
blue.setOnAction(e -> {
Square.setFill(Color.BLUE);
Circle1.setFill(Color.BLUE);
});
circle.setOnAction(e -> {
Circle1.setCenterX(100);
Circle1.setCenterY(100);
Circle1.setRadius(45);
});
BorderPane borderPane = new BorderPane();
borderPane.getChildren().addAll(Square, Circle1, hBox);
Scene scene = new Scene(borderPane, 600, 500);
primaryStage.setTitle("ShowBorderPane");
primaryStage.setScene(scene);
primaryStage.show();
}
}