Simple Python Stopwatch

stopwatch.py

import time
seconds = 0
minutes = 0
hours = 0
mseconds = 0
while True:
    print(hours, ":", minutes, ":", seconds, ":", mseconds)
    time.sleep(0.01)
    if minutes == 59:
        hours += 1
        minutes = 0
    if seconds == 59:
        seconds = 0
        minutes += 1
    if mseconds == 59:
        seconds += 1
        mseconds = 0
    else:
        mseconds += 1