#!/usr/bin/env python
import RPi.GPIO as GPIO
import time
GPIO.setmode(GPIO.BOARD)
GPIO.setup(7, GPIO.OUT)
GPIO.setup(16, GPIO.OUT)
GPIO.setup(22, GPIO.OUT)
def Blink(numTimes,speed):
    for i in range(0,numTimes):
    print "Iteration " + str(i+1)
    GPIO.output(7,True)
    GPIO.output(22,False)
    GPIO.output(16,False)
    time.sleep(speed)
    GPIO.output(7,False)
    GPIO.output(22,True)
    GPIO.output(16,False)
    time.sleep(speed)
    GPIO.output(7,False)
    GPIO.output(22,False)
    GPIO.output(16,True)
    time.sleep(speed)
    GPIO.output(7,False)
    GPIO.output(22,False)
    GPIO.output(16,False)
    print "Done"
    GPIO.cleanup()
iterations = raw_input("Enter total number of times to blink: ")
speed = raw_input("Enter length of each blink(seconds): ")
Blink(int(iterations),float(speed))