#brings the library that allows time and sleep in and renaims it to t
#sleep is defined as time.sleep(duration)
import time as t
#def defines a function
#sec is a function of the library
#this is where the countdown starts
def stopwatch(time):
    while time:
    #while exectues statements as long as a condition is true
            minn, secc = divmod(time, 60)
            timeformat = '{:02d}:{:02d}'.format(minn, secc)
            print(timeformat, end='\r')
            t.sleep(1)
            time -= 1
uTime = input("How long to countdown? ")
stopwatch(uTime)
print('Goodbye!\n')