when i run the code, the python turtle graphics stop responding

Question

when i run the code the input window shows and i enter the number of squares but after that, python turtle graphics stop responding and then desapear without showing anything

#
import turtle
from random import randint
turtle.tracer(0)
turtle.bgcolor('black')
#Takes user input to decide how many squares are needed
f=int(input("How many squares do you want?"))

i=1

x=65

#Draws the desired number of squares.
while i < f:
    i=i+1
    x=x*1.05
    while x<400 :
      r=randint(0,255)
      g=randint(0,255)
      b=randint(0,255)
      turtle.colormode(255)
      turtle.pencolor(r,g,b)
      turtle.bk(x)
      turtle.rt(90)
      turtle.bk(x)
      turtle.rt(90)
      turtle.bk(x)
      turtle.rt(90)
      turtle.bk(x)
      turtle.rt(90)
      turtle.up()
      turtle.rt(9)
      turtle.down()
turtle.update()
turtle.mainloop()

Answer 1

Just move turtle.update() in the loop and add break , so after the number of squares are drawn, the window stops updating.

import turtle
from random import randint
turtle.tracer(0)
turtle.bgcolor('black')
#Takes user input to decide how many squares are needed
f=int(input("How many squares do you want?"))

i=1

x=65

#Draws the desired number of squares.
while i < f:
    i=i+1
    x=x*1.05
    while x<400 :
      r=randint(0,255)
      g=randint(0,255)
      b=randint(0,255)
      turtle.colormode(255)
      turtle.pencolor(r,g,b)
      turtle.bk(x)
      turtle.rt(90)
      turtle.bk(x)
      turtle.rt(90)
      turtle.bk(x)
      turtle.rt(90)
      turtle.bk(x)
      turtle.rt(90)
      turtle.up()
      turtle.rt(9)
      turtle.down()
      turtle.update()
turtle.mainloop()