simple pir security

gistfile1.txt

import RPi.GPIO as GPIO
import time

GPIO.setmode(GPIO.BCM)

GPIO.setup(17, GPIO.IN) #PIR
GPIO.setup(21, GPIO.OUT) # LED
GPIO.setup(4, GPIO.OUT) # RELAY

try:
    time.sleep(2) # to stabilize sensor
    while True:
        if GPIO.input(17):
            print("Motion Detected...")
            GPIO.output(21, True) # LED
            GPIO.output(4, False) # Relay
            time.sleep(5) #to avoid multiple detection
        else:
            print("Clean...")
            GPIO.output(21, False)
            GPIO.output(4, True) # Relay
            time.sleep(0.1) #loop delay, should be less than detection delay

except:
    GPIO.cleanup()