import os
import time
import threading
def t2(sleep_time):
while 1:
print("*******************")
time.sleep(sleep_time)
if __name__=="__main__":
sleep_time = 3
t = threading.Thread(target=t2,args=(sleep_time,))
t.setDaemon(True)
t.start()
for i in range(1000000):
print i