from machine import Pin
import utime

trigger=Pin(2,Pin.OUT)
echo=Pin(3,Pin.IN)

def ultra():
    trigger.low()
    utime.sleep_us(2)
    trigger.high()
    utime.sleep_us(5)
    trigger.low()
    while echo.value()==0:
        signaloff=utime.ticks_us()
        while echo.value()==1:
            signalon=utime.ticks_us()
            timepassed=signalon-signaloff
            distance=(timepassed * 0.0343)/2
            print("The distance from the object is ",distance, " cm")
while True:
    ultra()
    utime.sleep(1)