import machine
import utime

sensor_pir = machine.Pin(28, machine.Pin.IN)
led = machine.Pin(15, machine.Pin.OUT)
buzzer = machine.Pin(14, machine.Pin.OUT)

def pir_handler(pin): 
    print("ALARM! Motion detected!") 
    for i in range(50): 
        led.toggle() 
        buzzer.toggle() 
        utime.sleep_ms(100)

sensor_pir.irq(trigger=machine.Pin.IRQ_RISING, handler=pir_handler)

while True: 
    led.toggle() 
    utime.sleep(5)