Python, Turtle - File "<string>", line 12, in forward turtle.Terminator

Question

Hi there I have written a program in Python 3.10 and i am using the Library Tuple

I have 4 different classes: Polygon, Square(Polygon) - Child Class, Shape and Point.

The problems that I have are:

1. 1 want to plot them on different graphs

I have some more code in between drawing the graphs and the thing is:

2. The problem is when I close the first window to execute the remaining code it pops the error: Python, Turtle - File "", line 12, in forward turtle.Terminator

   class Polygon:
   
      def __init__(self, sides, name, side_length=100, colour="black", line_thickness=5, x_pos=90, y_pos = 90):
           self.sides = sides
         self.name = name
         self.side_length = side_length
         self.colour = colour
         self.line_thickness = line_thickness
         self.x_pos = x_pos
         self.y_pos = y_pos
   
    def draw(self):
    turtle.penup()
    turtle.setpos(self.x_pos, self.y_pos)
    for i in range(self.sides):
        turtle.pendown()
        turtle.color(self.colour)
        turtle.pensize(self.line_thickness)
        turtle.forward(self.side_length)
        turtle.right(180 - self.individual_angle)
   
   class Square(Polygon):
     def __init__(self, side_length=100, colour="black", line_thickness=5, x_pos=90, y_pos=90):
        super().__init__(4, "Square", side_length, colour, line_thickness, x_pos, y_pos)
   
     def draw(self):
          turtle.begin_fill()
          super().draw()
          turtle.end_fill()
   
   
   
   square = Polygon(4, "Square", 100, line_thickness=10, x_pos=-300, y_pos=-20)
    pentagon = Polygon(5, "Pentagon", colour="red", x_pos=-50, y_pos=-220)
    hexagon = Polygon(6, "Hexagon", 150, "orange", x_pos=180, y_pos=320)
    square.draw()
    hexagon.draw()
    pentagon.draw()
    square2 = Square(colour="red", side_length=250, x_pos=92, y_pos=-100)
    square2.draw()
    turtle.done()
   

No, my code does not have any indentation errors.