code: def ellipse(self, org_x, org_y, radius_x, radius_y, arc_start, arc_end):
          
          ellipse = pgmagick.DrawableEllipse(float(org_x), float(org_y),
                                             float(radius_x), float(radius_y),
                                             float(arc_start), float(arc_end))
          self.drawer.append(ellipse)
docs: :param org_x: origination x axis
          :param org_y: origination y axis
          :param radius_x: radius x axis
          :param radius_y: radius y axis
          :param arc_start: arc start angle
          :param arc_end: arc end angle