import RPi.GPIO as GPIO
import sys

arg=str(sys.argv[1])

#print ("%s" % arg )

GPIO.setmode(GPIO.BCM)
GPIO.setwarnings(False)
GPIO.setup(18,GPIO.OUT)

if arg=="on":
   # print "LED on"
   GPIO.output(18,GPIO.HIGH)
else:
   # print "LED off"
   GPIO.output(18,GPIO.LOW)