First, you need to find the interior angles.
Using (n-2)*180/n: 1 interior angle is 108 degrees.
So using a for loop:

# blah blah setup code
for i in range(1,5):
    turtle.forward(100)
    turtle.left(108)

Hey there, please make sure your post body is at least 10 words and 100 characters. That makes it easier for our community to help you!

Hey there, please make sure your post body is at least 10 words and 100 characters. That makes it easier for our community to help you!