Дмитрий

def count():
    textLen = str(len(text.get(1.0, END)))
    wordCounter["text"] = "Символов в тексте: " + textLen

text.bind("<Key>", lambda e: count())

from tkinter import *
from time import sleep

window = Tk()
c = Canvas(window, width=800, height=500, bg='darkblue')
c.pack()

def text_show():
    c.create_text(400,250, text='You win!',\
                  font=('Helvetica', 30), fill='white')
    window.update_idletasks()
    sleep(5)
    exit()

c.after(500, text_show)   # in milliseconds