import machine
from machine import Pin
from time import sleep_us,sleep

buzzer=Pin(23,Pin.OUT) 
echo=Pin(18,Pin.IN)
trig=Pin(5,Pin.OUT)

while True:
    trig.value(0)
    sleep_us(2)
    trig.value(1)
    sleep_us(10)
    trig.value(0)
    
    x=machine.time_pulse_us(echo,1)
    distance=(0.034*x)/2 
    print('Distance:', distance, 'cm')
    if distance >= 100:
    sleep(1)