from machine import Pin,time_pulce_us
import time

trig_pin = Pin(4,Pin.OUT)
echo_pin = Pin(5,Pin.IN)

while True:
    # trigger the sensor
    trig_pin.value(0)
    time.sleep_us(2)
    trig_pin.value(1)
    time.sleep_us(10)
    trig_pin.value(0)
    
    #measure the duration of the echo pulse
    duration_us = time_pulse_us(echo-pin,1)

    #calcule t6he distance based on the duration
    distance-cm = duration-us /58.0

    print("Distance:",distance_cm,"cm")

    time.sleep(1)