from machine import Pin
import utime

led_list = [28,27,26,22,21,20,19,18,17,16]
n=0

trigger = Pin(15, Pin.OUT)
echo = Pin(2, Pin.IN)

for pin_num in led_list:
  led_list[n] = Pin(pin_num, Pin.OUT)
  n+=1

def todos(array):
  for x in range(10): 
    led_list[x].value(array[x])

def liga(quantos):
  print (quantos)
  for ligado in range(quantos):
    led_list[ligado].value(1)

  if quantos==1:
    todos([1,0,0,0,0,0,0,0,0,0])
  if quantos==2:
    todos([1,1,0,0,0,0,0,0,0,0])
  if quantos==3:
    todos([1,1,1,0,0,0,0,0,0,0])
  if quantos==4:
    todos([1,1,1,1,0,0,0,0,0,0])
  if quantos==5:
    todos([1,1,1,1,1,0,0,0,0,0])
  if quantos==6:
    todos([1,1,1,1,1,1,0,0,0,0])
  if quantos==7:
    todos([1,1,1,1,1,1,1,0,0,0])

while True: 
  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
  #distance = "{:.1f}".format(distance)

  result = ((distance/100) % 10) * 2.5
  liga(int(result))

  utime.sleep(0.5)