eTWQAWETGWERT

public void paint(Graphics g){
        Graphics2D g2 = (Graphics2D)g;
//        g2.drawLine(100, 100, 200, 100);
//        g2.drawRect(100, 200, 100, 100);
//        g2.drawOval(250, 200, 100, 100);

          int x=0;
          int y=0;
          int size=600;
          for(x=50,y=50;x<size-50;x+=10,y+=10){
              g2.drawRect(x, y, size-2*x, size-2*y);
          }
    }