from machine import Pin
from time import sleep
from hcsr04 import HCSR04

but_1 = Pin(15, Pin.IN, Pin.PULL_UP)
led_1 = Pin(2, Pin.OUT)
senso = HCSR04(trigger_pin = 5, echo_pin = 18)

while True:
    but_sta1 = but_1.value()
    if but_sta1 == 0:
        distance = senso.distance_cm()
        for i in range(distance):
            led_1.value(1)
            sleep(0.1)
            led_1.value(0)
            sleep(0.1)