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


        public class button extends Applet implements ActionListener
 {

          Button redButton = new Button("Red");
          Button blueButton = new Button("Blue");
          Button greenButton = new Button("Green");
          Button whiteButton = new Button("White");
          Button blackButton = new Button("Black");

          public void init() {
            setBackground(Color.red);
            add(redButton);
            add(blueButton);
            add(greenButton);
            add(whiteButton);
            add(blackButton);
            redButton.addActionListener(this);
              blueButton.addActionListener(this);
                greenButton.addActionListener(this);
                 whiteButton.addActionListener(this);
                    blackButton.addActionListener(this);
          }


 public void actionPerformed(ActionEvent evt) { 
          setBackground(Color.white);
            if (evt.getSource() == redButton) 
                   setBackground(Color.red);
               else if (evt.getSource() == blueButton)
                   setBackground(Color.blue);
               else if (evt.getSource() == greenButton)
                   setBackground(Color.green);
               else if (evt.getSource() == whiteButton)
                   setBackground(Color.white);
               else setBackground(Color.black);
              repaint();
              }
        }