gEllipse()

         Draws an ellipse in graphic mode

    Syntax:

         gEllipse ( nCenterX, nCenterY, nFocusA, nFocusB, nColor ) -> Nil

         nCenterX : Coordinate X of center
         nCenterY : Coordinate Y of center
         nFocusA  : Valor of focus A
         nFocusB  : Valor of focus B
         nColor   : Numeric value colour

    Description:

         It draws an ellipse in graphic mode. The mode must be EGA or VGA.

    Return:

         Nothing.

    Example:

         gEllipse ( 200, 300, 60, 50, 3 )