from machine import Pin, ADC
from neopixel import NeoPixel
from time import sleep_ms

pAnalogico = Pin(33)
sensor = ADC(pAnalogico)
pNeoPixel = Pin(23, Pin.OUT)
np = NeoPixel(pNeoPixel, 16)

while True:
    for posicao in range(len(np)):
        np[posicao] = (0, 0, 255)
        np.write()
        sleep_ms(100)
    
    for posicao in range(len(np)-1,-1,-1):
        np[posicao] = (0, 0, 0)
        np.write()
        sleep_ms(100)