How to implement a daemon process in Python?

I am writing a small program which has a heartbeat process and an echo process. I implemented this with a multiprocessing library, but it doesn't seem to work.

from multiprocessing import Process
import os
import time

def ticking():
    while True:
        time.sleep(1)
        print 'ticking'

def echo():
    while True:
        a = raw_input('please type something')
        print 'echo: ' + a

if __name__ == '__main__':
    p = Process(target=ticking, args=())
    p.start()
    p.join()

    p = Process(target=echo, args=())
    p.start()
    p.join()