from machine import Pin
import utime
from picozero import Speaker

trig=Pin(10,Pin.OUT)
echo=Pin(13,Pin.OUT)
led=Pin(18,Pin.OUT)
buz=Speaker(26)

while True:
    trig.off()
    utime.sleep_us(2)
    trig.on()
    utime.sleep_us(4)
    trig.off()
    while echo.value()==0:
        off_time=utime.ticks_us()
    while echo.value()==1:
        on_time=utime.ticks_us()
    total_time=on_time-off_time
    distance=(total_time*0.034)/2
    print("distance of object :",distance,"cm")
    utime.sleep_us(1)

    if 1<=distance<=100:
        led.on()
        buz.on()
    else:
        led.off()
        buz.off()