LED blinking at boot up

pi@raspberrypi:~ $ more /home/pi/Desktop/LED_blinking.py
#!/usr/bin/python
import RPi.GPIO as GPIO
from time import sleep

led = [4,17,22,10,9,11];

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

for l in led:
    GPIO.setup(l,GPIO.OUT)
    GPIO.output(l,GPIO.LOW)

while True:
    for l in led:
        GPIO.output(l,GPIO.HIGH)
        sleep(0.1)
        GPIO.output(l,GPIO.LOW)

pi@raspberrypi:~ $ more /etc/rc.local
#!/bin/sh -e
. . .
echo "starting LED blinking"
/home/pi/Desktop/LED_blinking.py &

. . . 

exit 0