Python countdown timer https://youtu.be/9QSo3F6sM1w

countertimer.py

import time
import argparse

parser = argparse.ArgumentParser()
parser.add_argument('-t', '--time', type=int, required=True, help="Time in seconds")
parser.add_argument('-o', '--output',default="counter.txt", help="Output file")
args = parser.parse_args()

def countdown(t):
    while t:
        timefile = open(args.output, "w")
        mins, secs = divmod(t, 60)
        if mins > 59:
            hours, mins = divmod(mins, 60)
        else:
            hours = 0
        timeformat = f"{hours:02d}:{mins:02d}:{secs:02d}"
        timefile.write(timeformat)
        timefile.close()
        time.sleep(1)
        t -= 1

countdown(args.time)