import java.awt.*;
import java.applet.Applet;
import java.awt.event.*;

public class Figures extends Applet
{
    private Graphics g;

    public void init ()
    {
        addMouseListener (new DrawPictureListener ());
        g = getGraphics ();
    } // method init

    // Inner class that draws the picture when the user clicks the mouse.
    class DrawPictureListener implements MouseListener
    {
        public void mouseClicked (MouseEvent e)
        {
            Picture picture = new Picture ();
            picture.drawPicture (g);
        } // method mouseClicked

        public void mouseEntered (MouseEvent e) {}
        public void mouseExited (MouseEvent e) {}
        public void mousePressed (MouseEvent e) {}
        public void mouseReleased (MouseEvent e) {}
    } // class DrawPictureListener
} // class Figures

class Picture
{
    public void drawPicture (Graphics g)
    {
        Circle circle;
        Color color;
        for (int count = 0; count < 200; count += 10)
        {
            if (count % 20 == 0)
                color = Color.red;
            else
                color = Color.blue;
            circle = new Circle (color, 50, 50, count);
            circle.drawCircle (g);
        }
    } // method drawPicture
} // class Picture

class Circle
{
    private Color color;
    private int x, y, diameter;

    Circle (Color c, int xPosition, int yPosition, int d)
    {
        color = c;
        x = xPosition;
        y = yPosition;
        diameter = d;
    } // constructor

    public void drawCircle (Graphics g)
    {
        g.setColor (color);
        g.drawOval (x, y, diameter, diameter);
    } // method drawCircle
} // class Circle