import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class SomeShapes extends JFrame 
    implements ActionListener {

//    GUI code omitted here...


    private JButton button;
    private JPanel panel;

    public static void main (String[] args) {
        SomeShapes frame = new SomeShapes();
        frame.setSize(400, 300);
        frame.createGUI();
        frame.show();
    }

    private void createGUI() {
        setDefaultCloseOperation(EXIT_ON_CLOSE);
        Container window = getContentPane();
        window.setLayout(new FlowLayout() );

        panel = new JPanel();
        panel.setPreferredSize(new Dimension(300, 200));
        panel.setBackground(Color.white);
        window.add(panel);

        button = new JButton("Press me");
        window.add(button);
        button.addActionListener(this);
    }
    //   ***** nb line of 4 spaces after insert
    
    public void actionPerformed(ActionEvent event) {
        Graphics paper = panel.getGraphics();
        paper.drawRect(30, 30, 80, 40);
        paper.drawOval(130, 30, 50, 50);
        paper.drawOval(230, 30, 30, 50);
        paper.setColor(Color.lightGray);
        paper.fillRect(30, 100, 80, 40);
        paper.fillOval(130, 100, 50, 50);
        paper.fillOval(230, 100, 30, 50);
    }
}