import _thread
import time

# Function for the first while loop
def loop1():
    while True:
        print("Thread 1 is running 1 sec")
        time.sleep(1)

# Function for the second while loop
def loop2():
    while True:
        print("Thread 2 is running 2 sec")
        time.sleep(2)

# Create and start two threads
_thread.start_new_thread(loop1, ())
_thread.start_new_thread(loop2, ())

# Main thread can also do some work
while True:
    print("Main thread is running 3 sec")
    time.sleep(3)