seconds = 56
minutes = 59
hours = 2

import time
from turtle import *
setup()
t1 = Turtle()
while True:
    t1.clear()

    t1.write(str(hours).zfill(2) + ":" + str(minutes).zfill(2) + ":" + str(seconds).zfill(2))
    seconds =seconds + 1
    time.sleep(1)
    if seconds ==60:
        seconds = 0
        minutes = minutes +1
    if minutes == 60:
        minutes = 0
        hours = hours + 1