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




public class test1 extends Applet {
    MotionCanvas X;
    Animator A;  
    TextCanvas T;

    public void init() {

	setBackground(Color.black);
	A=new Animator();
	X=new MotionCanvas();
	A=A.addMotionCanvas(X);
	X=X.addAnimator(A);
	X.resize(200,100);
	T=new TextCanvas();
	T.resize(200,50);
	X.setBackground(Color.black);
	add(X);
	add(T);
	try {
          A.start();
	}

	catch(Exception e) {
	    System.out.println(e.toString());
	}
    }


}

  

class DBCanvas extends Canvas {
    
    public void update(Graphics g) {
        Graphics g2;
        Image offscreen = null;
        offscreen = createImage(size().width, size().height);
        g2 = offscreen.getGraphics();
        paint(g2);
        g.drawImage(offscreen, 0, 0, this);
	g2.dispose();
	offscreen.flush();
    }
}



class TextCanvas extends Canvas {
    TextCanvas() {}
    public void paint(Graphics g) {
      g.setFont(new Font("TimesRoman",Font.PLAIN,30));
      g.setColor(Color.yellow);
      g.drawString("Rich: Applet 18",10,30);
    }
}


class MotionCanvas extends DBCanvas {

    Animator A;

    MotionCanvas() {
	setBackground(Color.black);
    }

    MotionCanvas addAnimator(Animator A) {
	MotionCanvas Y=this;
        Y.A=A;
	return(Y);
    }


  public void paint(Graphics g) {   
      int count,mod;
      count=A.getCount();
      mod=count;

      g.setColor(Color.blue);
      for(int i=1;i<=7;++i) {
      g.fillRect(-500+100*i+mod,0,50,25);
      g.fillRect(-500+100*i+2*mod,25,50,25); 
      g.fillRect(-500+100*i+3*mod,50,50,25);
      g.fillRect(-500+100*i+4*mod,75,50,25);

      }

      g.setColor(Color.yellow);
      for(int i=1;i<=7;++i) {
      g.fillRect(-450+100*i+mod,0,50,25);
      g.fillRect(-450+100*i+2*mod,25,50,25);
      g.fillRect(-450+100*i+3*mod,50,50,25);
      g.fillRect(-450+100*i+4*mod,75,50,25);
      }


      g.setColor(Color.black);
      for(int i=1;i<=17;++i) {
	  for(int j=0;j<=3;++j) {
          g.drawRect(-500+50*i+(j+1)*mod,25*j,50,25); 
	  }
      }


  }
}







class Animator extends Thread {
    private int count;
    MotionCanvas X;

    public void run() {
	count=0;
	while(true) {
	    count=count+1;
	    if(count==100) count=0;
	    X.repaint();
	    try {sleep(20);}
	    catch(Exception e) {
		System.out.println(e.toString());
	    }
	}
    }

    Animator addMotionCanvas(MotionCanvas X) {
	Animator B=this;
	B.X=X;
	return(B);
    }

    public int getCount() {
      return(count);
    }
}