import java.awt.*;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.util.concurrent.TimeUnit;

import javax.swing.*;

public class graphics extends JFrame implements KeyListener{


static int x=10, oldx=0;
static int y=10, oldy=0;
int length = 100;

public graphics(){

super();
}


public void paint(Graphics g){

g.drawLine(x,y,x+length,y+length);
//g.setColor(Color.WHITE);
//g.drawLine(oldx,oldy,oldx+length,oldy+length);

}

public static void main(String arg[]) throws InterruptedException{

graphics frame = new graphics();


frame.setSize(1000,1000);


frame.setVisible(true);



frame.repaint();

//TimeUnit.SECONDS.sleep(1);


frame.addKeyListener(new KeyListener(){

@Override
public void keyPressed(KeyEvent arg0) {

x++;
y++;
frame.repaint();
}

@Override
public void keyReleased(KeyEvent arg0) {
// TODO Auto-generated method stub

}

@Override
public void keyTyped(KeyEvent arg0) {
// TODO Auto-generated method stub

}

});


}
}