a counter connected with your local PC time in real time

import time
from time import gmtime, strftime

#the counter in my case is 20 minutes.
#i want a script to run in 20 minutes
counter = 1200

while counter != 0:
    #this is your local notebook time, as it changes in seconds
    #i.e. for example 23:34:35
    date = strftime("%H:%M:%S")
    print(date, 'The next script is going to be run in %d seconds' % counter, end='\r')
    #this sleep is 1 second, for ex. 23:33:32, 23:33:31, so on
    time.sleep(1)
    counter -= 1

#initial = time.time()
#while True:
    #print(time.time() - initial, end='\r')