return ;
 public void bigBang(int width, int height, double s) {	if (width <= 0)           throw new RuntimeException(	              "The method bigBang(int,int,double) expects " +		       "the first argument to be greather than 0, given " 		       + width);	if (height <= 0)	    throw new RuntimeException(                       "The method bigBang(int,int,double) expects " +		       "the second argument to be greather than 0, given " 		       + height);	if (s <= 0)	    throw new RuntimeException(                       "The method bigBang(int,int,double) expects " +		       "the third argument to be greather than 0, given " 		       + s);	theCanvas = new Canvas(width,height); 	bigBangO(s);    }