/*
 *
 */

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


/**
 *
 */

public class TimerBasedPsychodelic {
    
  /**
   * entry point, create an instance and pass on to createAndShowGUI()
   */
  public static void main (String[] args) {
    final TimerBasedPsychodelic p = new TimerBasedPsychodelic();
    javax.swing.SwingUtilities.invokeLater(new Runnable() {
	  public void run() {
	    p.createAndShowGUI();
	  }
	});
    int delay = Math.max(1,Integer.parseInt(args[0]));
    int seed = (args.length > 1) ? Integer.parseInt(args[1]) : 0;
    int numIterations = (args.length > 2) ? Integer.parseInt(args[2]) : Integer.MAX_VALUE;
    p.go(delay,seed,numIterations);
  }


  public void go(int delay, int seed, int numIterations) {
    final Random r = new Random(seed);
    final Color[] colors = new Color[]{Color.BLACK,Color.BLUE,Color.CYAN,Color.DARK_GRAY,
				 Color.GRAY,Color.GREEN,Color.LIGHT_GRAY,
				 Color.MAGENTA,Color.ORANGE,Color.PINK,
				 Color.RED,Color.WHITE,Color.YELLOW};
    _counter = numIterations;
    ActionListener createNextCircle = new ActionListener() {
	  public void actionPerformed(ActionEvent evt) {
	    if (_counter-- < 0) {
	      _timer.stop();
	    } else if (_frame != null) {
	      _x = r.nextInt(Math.max(1,_frame.getWidth()));
	      _y = r.nextInt(Math.max(1,_frame.getHeight()));
	      _radius = 20 + r.nextInt(30);
	      _color = colors[r.nextInt(colors.length)];
	      _frame.repaint();
	    }
	  }
	};
    _timer = new javax.swing.Timer(delay,createNextCircle);
    _timer.start();
  }


  
  private JFrame _frame;

  /**
   * sets up everything, and then makes Frame visible
   */
  public void createAndShowGUI() {
    //Create and set up the window.
    _frame = new JFrame("TimerBasedPsychodelic") {
	  public void paint(Graphics g) {
	    g.setColor(_color);
	    g.fillOval(_x-_radius,_y-_radius,2*_radius,2*_radius);
	  }
	};
    _frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    _frame.setPreferredSize(new Dimension(400,400));
    _frame.pack();
    _frame.setVisible(true);
  }
  
  private int _x = 0;
  private int _y = 0;
  private int _radius = 0;
  private Color _color = null;

  private int _counter = 0;
  private javax.swing.Timer _timer;

}