import RPi.GPIO as GPIO
import time

# Use GPIO 17
PIN = 17
GPIO.setmode(GPIO.BCM)
GPIO.setup(PIN, GPIO.OUT)

try:
    print("Flashing LED for 10 seconds...")
    start_time = time.time()
    while time.time() - start_time < 5:
        GPIO.output(PIN, GPIO.HIGH)
        time.sleep(0.3)
        GPIO.output(PIN, GPIO.LOW)
        time.sleep(0.3)
finally:
    GPIO.cleanup()
    print("Done.")