Help : I want the sound to sound at the left and right of the screen..I also want it to continue forever....but the sound plays 4 times and stop...kindly help

import java.awt.*;
import java.util.Formatter;
import javax.swing.*;
import java.io.File;
import java.io.IOException;
import javax.sound.sampled.*;

import java.awt.Toolkit;

// Extends JPanel, so as to override the paintComponent() for custom
rendering codes.
public class second extends JPanel {

// Container box's width and height
private static final int BOX_WIDTH = 640;
private static final int BOX_HEIGHT = 480;
private Clip clip;
// Ball's properties
private float ballRadius = 50; // Ball's radius
private float ballX =250- ballRadius ; // Ball's center (x, y)
private float ballY = 250-ballRadius;
private float ballSpeedX = 7; // Ball's speed for x and y
//private float ballSpeedY = 2;

private static final int UPDATE_RATE = 30; // Number of refresh per
second

/** Constructor to create the UI components and init game objects. */
public second() {
super();

this.setPreferredSize(new Dimension(BOX_WIDTH, BOX_HEIGHT));

// Start the ball bouncing (in its own thread)
Thread gameThread = new Thread() {
public void run() {
 try {
// Open an audio input stream.
File soundFile = new File("resources/snd16.wav");

// Get a sound clip resource.
Clip clip = AudioSystem.getClip();
// Open audio clip and load samples from the audio input stream.
 AudioInputStream audioIn =
AudioSystem.getAudioInputStream(soundFile);
 clip.open(audioIn);
 while (true) { // Execute one update step
 // Calculate the ball's new position
 ballX += ballSpeedX;
 // Check if the ball moves over the bounds
 // If so, adjust the position and speed.
 if (ballX - ballRadius < 0) {
 ballSpeedX = -ballSpeedX; // Reflect along normal
 ballX = ballRadius; // Re-position the ball at the edge
 clip.start();

 clip.loop(Clip.LOOP_CONTINUOUSLY));

 } else if (ballX + ballRadius > BOX_WIDTH) {
 ballSpeedX = -ballSpeedX;
 ballX = BOX_WIDTH - ballRadius;

 //clip.setLoopPoints(0, 1);
 clip.start();
  }

 // Refresh the display
 repaint(); // Callback paintComponent()
 // Delay for timing control and give other threads a chance
 try {
 Thread.sleep(1000 / UPDATE_RATE); // milliseconds
 } catch (InterruptedException ex) { }
 }

} catch (UnsupportedAudioFileException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} catch (LineUnavailableException e) {
e.printStackTrace();
 }
 //boolean isEnableSound;

}
};
gameThread.start(); // Callback run()
}

/** Custom rendering codes for drawing the JPanel */
@Override
public void paintComponent(Graphics g) {
super.paintComponent(g); // Paint background

// Draw the box
g.setColor(Color.BLACK);
g.fillRect(0, 0, BOX_WIDTH, BOX_HEIGHT);

// Draw the ball
g.setColor(Color.GREEN);
g.fillOval((int) (ballX - ballRadius), (int) (ballY - ballRadius),
(int)(2 * ballRadius), (int)(2 * ballRadius));

// Display the ball's information
g.setColor(Color.WHITE);
g.setFont(new Font("Courier New", Font.PLAIN, 12));
StringBuilder sb = new StringBuilder();
Formatter formatter = new Formatter(sb);
formatter.format("Ball @(%3.0f) Speed=(%2.0f)", ballX,ballSpeedX);
g.drawString(sb.toString(), 20, 30);
}

/** main program (entry point) */
public static void main(String[] args) {
// Run GUI in the Event Dispatcher Thread (EDT) instead of main
thread.
javax.swing.SwingUtilities.invokeLater(new Runnable() {
public void run() {
// Set up main window (using Swing's Jframe)
JFrame frame = new JFrame("A Moving Ball");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setContentPane(new second());
frame.pack();
frame.setVisible(true);
}
});
}
}