import javabook.*;
//muestra uso de un DrawingBoard
class JavaBook4 {
public static void main(String []  args) {
  
  DrawingBoard lienzo = new DrawingBoard();
  System.out.println(lienzo);
  
  lienzo.setVisible(true);
  for (int x=0;x<500;x++) {
    lienzo.drawCircle(50+x,50,5);
   lienzo.drawRectangle(100+x,100,20,30);
   }
  
 }
}