public class Ball  
BEGIN   
   Real x,y      // Current position of the ball.
   
   Color color     // The color of the ball.

   integer  radius   // The radius of the ball

   public Ball() // constructor
   BEGIN
      x = 100
      y = 100
      radius = 5
	  color = ORANGE  // set color to the colour ORANGE
   END
   
   public void draw() 
   BEGIN
      // Draw the ball   
      set colour for drawing to color
      drawFilledOval in bounding rectangle, 
		top left (x, y), bottom right (x + 2*radius, Y + 2*radius)
   END
   
   public void setRadius(integer r)
   BEGIN
       radius = r
   END
   
   public integer getRadius()
   BEGIN
       return radius
   END
    
   public integer getX()
   BEGIN
        return (integer) x
   END
    
   public integer getY()
   BEGIN
        return (integer) y
   END
   
   public void setX(integer xIn)
   BEGIN
       x = xIn
   END
   
   public void setY(integer setY)
   BEGIN
       y = setY
   END
END  // end class Ball