import time
time.sleep(0.1) # Wait for USB to become ready
from machine import Pin,PWM,ADC
pot=ADC(Pin(28))
led=PWM(Pin(16))
led.freq(600)
pir=Pin(17,Pin.IN)
buzzer=PWM(Pin(18))
while True:
    raw=pot.read_u16()
    if raw==0: continue
    if pir.value()==1:
        for i in range(1,3):
            if raw==0:
                break
            ra=65535-45000
            buzzer.duty_u16(30000)
            freq=int(200+(ra/65535)*(4000-200))
            buzzer.freq(freq)
            led.duty_u16(0)
            time.sleep(1)
            ra=55555 
            buzzer.duty_u16(30000)
            freq=int(200+(ra/65535)*(4000-200))
            buzzer.freq(freq)
            led.duty_u16(ra)
            time.sleep(1)
            buzzer.duty_u16(0)
            led.duty_u16(0)