from machine import Pin, PWM
from hcsr04 import HCSR04

sensor = HCSR04(trigger_pin=12, echo_pin=14, echo_timeout_us=1000000)
servo = PWM(Pin(18,Pin.OUT), freq=50)

for t in range(24,123):
  # Abre
  servo.duty(24)
  while sensor.distance_cm() < 100:
    pass

  #Fecha
  servo.duty(74)
  while sensor.distance_cm() >= 100:
    pass