import machine
import utime
from machine import Pin

trig1 = Pin (2, Pin.OUT)
echo1 = Pin (3, Pin.IN)


led1 = Pin (6, Pin.OUT)
led2 = Pin (7, Pin.OUT)

def dis1():
  timet1 = 0

  trig1.low()
  utime.sleep_us(2)
  trig1.high()
  utime.sleep_us(5)
  trig1.low()

  while echo1.value() == 0:
    signal1off = utime.ticks_us()

  while echo1.value() == 1:
    signal1on = utime.ticks_us()

  timet1 = signal1on - signal1off
  return timet1

while True:
  time1 = dis1()
  cm1 = time1 * 0.034 / 2
  print ("Distance : ", cm1, "cm")