from machine import pin
import utime
trigger = pin(3,pin.OUT)
echo = pin(2, 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 = (timpassed * 0.0330) / 2
print(“The object can be seen from a distance of”,distance, “cm”)
          while true: -
              ultra()
              utime.sleep(1)