from machine import Pin
import utime

trig = Pin(16, Pin.OUT)
echo = Pin(17, Pin.IN)
buzz = Pin(11, Pin.OUT)
led = Pin(15, Pin.OUT)
buzz.value(0)

while True:
    trig.value(0)
    utime.sleep_us(5)
    trig.value(1)
    utime.sleep_us(10)
    trig.value(0)
    while echo.value() == 0:
        pass
    Tmrstrt = utime.ticks_us()
    while echo.value() == 1:
        pass
    Tmrend = utime.ticks_us()
    duration =utime.ticks_diff(Tmrend, Tmrstrt)
    distance = duration * 0.0171
    print(distance)
    utime.sleep(2)
    if distance > 100:
        dely = 0
    elif distance > 70 and distance < 90:
        dely = 600
    elif distance > 50 and distance < 70:
        dely = 400
    elif distance > 30 and distance < 50:
        dely = 300
    elif distance > 10 and distance < 30:
        dely = 200
    elif distance < 10:
        dely = 10
    if distance < 100:
        buzz.value(1)
        led.value(1)
        utime.sleep_ms(dely)
        buzz.value(0)
        led.value(0)
        utime.sleep_ms(dely)