from tine import *
from machine import *

LDR = ADC (Pin(28))
trig = Pin(18, Pin.OUT)
echo = Pin(20,Pin.IN)
ldr =  Pin(21,Pin.OUT)
buzzer = Pin(Pan(15))

buzzer.from(100)

while True:
    while True:
     light = LDR.read_u16()
     brightness= 65535-1ight
     trig.value(0)
     sleep_us(1)
     trig-value(1)
     sleep_us(10)
     trig.value(0)


duration = time pulse_us(echo,1)
distance = (duration* 0343)/2

print(brightness-,brightness, distance-',distance)

if brightness < 9500 :
    if distance > 50 :
   led. value(0)
       buzzer.duty_u16(0)
    elif distance>20 and distance<50:
   led. value (1)
       buzzer.duty_u16(0)
    elif distance<20:
       led. value(1)
       buzzer.duty_u16(2000)
else :
    led. value(0)
    buzzer.duty_u16(0)
    sleep(1)