TclError what shouldI do

Question

I build my code in Colab and I have an error in the end. What's the problem? it is worth mentioning that I install pip install PythonTurtle in my account.

My code is:

import turtle

wn = turtle.Screen()

wn.bgcolor('lightgreen')

Ayhan = turtle.Turtle()

Ayhan.color('blue')

Ayhan.shape('turtle')

angle = 90

distance = 100

Ayhan.up()

for _ in range(18):

Ayhan.stamp()

Ayhan.forward(distance)

Ayhan.right(angle)

distance = distance + distance/10

angle = angle + 2

wn.exitonclick()

let me know what is my problem. Thanks