import machine 
import utime

TRIG = machine.Pin(15, machine.Pin.OUT)
ECHO = machine.Pin(16, machine.Pin.IN)

def Ultrasound():
    TRIG.low()
    utime.sleep_us(2)
    TRIG.high()
    utime.sleep_us(5)
    TRIG.low()
    while ECHO.value() == 0:
        signalOff = utime.ticks_us()
    while ECHO.value() == 1:
        signalOn = utime.ticks_us()
    timepassed = signalOn - signalOff
    distance = (timepassed * 0.0341) / 2
    print("Distance in cm ", distance)

while True:
    Ultrasound()
    utime.sleep(1)