import time
import RPi.GPIO as GPIO

pir_pin = 4
led_pin = 18

def motion_detected():
  # Your code to handle motion detection (e.g., turn on LED)
  GPIO.output(led_pin, GPIO.HIGH)
  print("Motion Detected!")

GPIO.setmode(GPIO.BCM)
GPIO.setup(pir_pin, GPIO.IN)
GPIO.add_event_detect(pir_pin, GPIO.RISING, callback=motion_detected)
GPIO.setup(led_pin, GPIO.OUT)

try:
  while True:
    GPIO.wait_for_edge(pir_pin, GPIO.FALLING)  # Wait for motion to stop (optional)
    GPIO.output(led_pin, GPIO.LOW)  # Turn off LED after motion stops (optional)
except KeyboardInterrupt:
  GPIO.cleanup()