import RPi.GPIO as GPIO
import time

GPIO.setmode(GPIO.BCM)

GPIO.setup(23, GPIO.OUT, initial=GPIO.LOW)
GPIO.setup(24, GPIO.OUT, initial=GPIO.LOW)
GPIO.setup(26, GPIO.OUT, initial=GPIO.LOW)


def do_blinky():
	while True:
		GPIO.output(23, False)
		GPIO.output(24, False)
		GPIO.output(26, True)
		time.sleep(0.5)
		GPIO.output(23, False)
		GPIO.output(24, True)
		GPIO.output(26, False)
		time.sleep(0.5)
		GPIO.output(23, True)
		GPIO.output(24, False)
		GPIO.output(26, False)
		time.sleep(0.5)


try:
	do_blinky()
except KeyboardInterrupt:
	pass


GPIO.cleanup()