script5.py

#!/usr/bin/python
import RPi.GPIO as GPIO
import time

GPIO.setmode(GPIO.BCM)

# init list with pin numbers

pinList = [2, 3, 4, 17, 27, 22, 10, 9]

# loop through pins and set mode and state to 'low'

for i in pinList:
    GPIO.setup(i, GPIO.OUT)
    GPIO.output(i, GPIO.HIGH)

# time to sleep between operations in the main loop

SleepTimeS = 0.2
SleepTimeL = 0.5

# main loop

try:
   while True:

      for i in pinList:
         GPIO.output(i, GPIO.LOW)
         time.sleep(SleepTimeS);
         GPIO.output(i, GPIO.HIGH)
         time.sleep(SleepTimeS);
         GPIO.output(i, GPIO.LOW)
         time.sleep(SleepTimeS);
         GPIO.output(i, GPIO.HIGH)
         time.sleep(SleepTimeL);




# End program cleanly with keyboard
except KeyboardInterrupt:
  print ("  Quit")

  # Reset GPIO settings
  GPIO.cleanup()

# find more information on this script at
# http://youtu.be/oaf_zQcrg7g