nz

from tkinter import *
import time

window = Tk()

running = True

def infinityloop():

    x = 0
    y = []

    x += 0

    c = Toplevel()
    c.config(bg='yellow')
    c.geometry('200x200')

    Label(c,text="pass",bg='yellow',
          font=('consolas',70)).place(x=80,y=100)

    if x%1 == 0:
        time.sleep(0)
        y.append(c)
        window.update()

    if c.quit():
         c.quit()
         running = False



if window:
    while running:
      infinityloop()



mainloop()