########################################
# file:    main.py
# project: Timers
# created: 2014-12-02 20:46:12.843231
########################################


pinMode(13, OUTPUT)
pinMode(21, OUTPUT)

def red():
    while True:
        digitalWrite(13, 0)
        sleep(500)
        digitalWrite(13, 1)
        sleep(500)

def yellow():
    while True:
        digitalWrite(21, 0)
        sleep(250)
        digitalWrite(21, 1)
        sleep(250)

thread(red)
thread(yellow)