PROGRES BAR IP

package matrixprogressbar;

import java.awt.Color;
import java.awt.Graphics;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.swing.JApplet;

/**
 *
 * @author Magi
 */
public class MatrixProgressBar extends JApplet implements Runnable{
    private int widthRect;
    private int heightRect;
    private int counter;
    @Override
    public void init() {
        widthRect = (getWidth()-1)/5;
        heightRect = (getHeight()-1)/5;
        counter = -1;
        Thread thr = new Thread(this);
        thr.start();
    }

    @Override
    public void paint(Graphics g) {
        super.paint(g);
        widthRect = (getWidth()-1)/5;
        heightRect = (getHeight()-1)/5;
        for(int i=0; i<5; i++){
            for(int j=0; j<5; j++){
                g.setColor(Color.BLACK);
                g.drawRect(i*widthRect, j*heightRect, widthRect, heightRect);
                g.setColor(Color.YELLOW);
                g.fillRect(i*widthRect+1, j*heightRect+1, widthRect-1, heightRect-1);
                if(j==counter/5&&i==counter%5){
                    g.setColor(Color.BLACK);
                    g.fillRect(i*widthRect+1, j*heightRect+1, widthRect-1, heightRect-1);
                }
            }
        }
    }

    @Override
    public void run() {
        while(true){
            if(counter == 24){
                counter = 0;
                repaint();
            }
            else{
                counter ++;
                repaint();
            }
            try {
                Thread.sleep(500);
            } catch (InterruptedException ex) {
                Logger.getLogger(MatrixProgressBar.class.getName()).log(Level.SEVERE, null, ex);
            }
        }
    }
}