import time
for i in range(100):
    print(i, time.ctime())
    time.sleep(0.03)       # отрегулируйте интервал сна

import time

first_time = time.clock
all_time = 0
for i in range(1000000000000):
    all_time += time.clock()
    if all_time > 1000:
        break
    print(all_time)