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

/* <applet code="ChangeColor.class" width="150" height="75"> </applet> */

public class ChangeColor extends JApplet implements ActionListener {
  Color[] cs = {Color.RED, Color.BLUE, Color.GREEN, Color.ORANGE};
  int i = 0;

  @Override
  public void init() {
    JButton b = new JButton("Next");
    b.addActionListener(this);
    setLayout(new FlowLayout());
    add(b);
  }

  @Override
  public void paint(Graphics g) {
    super.paint(g);
    g.setColor(cs[i]);
    g.drawString("HELLO WORLD!", 20, 50);
  }

  public void actionPerformed(ActionEvent e) {
    i = (i + 1) % cs.length;
    repaint();
  }

  public static void main(String[] args) {
    JFrame frame = new JFrame("");
    JApplet applet = new ChangeColor();
    applet.setPreferredSize(new Dimension(150, 100));
    frame.add(applet);
    frame.pack();
    frame.setVisible(true);
    applet.init();
    applet.start();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
  }
}