code: def circle(self, clear_screen=True, x=50, y=50, radius=40, fill_color='black', outline_color='black'):
          
  
          if clear_screen:
              self.clear()
  
          x1 = x - radius
          y1 = y - radius
          x2 = x + radius
          y2 = y + radius
  
          return self.draw.ellipse((x1, y1, x2, y2), fill=fill_color, outline=outline_color)
docs: Draw a circle of 'radius' centered at (x, y)