#! env/bin/python3

import RPi.GPIO as GPIO
import time

if __name__ == "__main__":

    # Setup for Hardware
    RELAY1_PIN = 26 
    RELAY2_PIN = 20
    RELAY3_PIN = 21

    GPIO.setmode(GPIO.BCM)
    GPIO.setwarnings(False)

    # Setup the output pin; initialize OFF.
    GPIO.setup(RELAY1_PIN, GPIO.OUT)
    GPIO.output(RELAY1_PIN, False)

    # Short toggle.
    i = 0
    try:
        time.sleep(1.0)
        GPIO.output(RELAY1_PIN, True)
        time.sleep(2.0)
        GPIO.output(RELAY1_PIN, False)
        time.sleep(1.0)
        
    finally:
        GPIO.cleanup()