from machine import Pin
import time

# Initialize PIR sensor and LED
pir = Pin(16, Pin.IN)
led = Pin(15, Pin.OUT)

# Variable to keep track of the LED state
led_on = False
led_timer = 0

while True:
    # Check for motion
    if pir.value():
        if not led_on:
            led.on()  # Turn on LED
            led_on = True
            led_timer = time.time()  # Start the timer
    else:
        if led_on and (time.time() - led_timer) >= 1:
            led.off()  # Turn off LED after 1 second
            led_on = False

    # Small delay to avoid excessive polling
    time.sleep(0.1)