from machine import Pin,ADC
from neopixel import NeoPixel
from time import sleep,sleep_ms
from random import randint
np = NeoPixel(Pin(16, Pin.OUT), 8)

red = (255, 0, 0)

dwq = ADC(Pin(34), atten=ADC.ATTN_11DB)
np = NeoPixel(Pin(16,Pin.OUT), 20)

def fill(color, num):
    if num == 0:
        for i in range(16):
            np[i] = (0, 0, 0)
    else:
        for i in range(num):
            np[i] = color
        for j in range(num,16):
            np[j] = (0, 0, 0)
    np.write()

while 1:
    dwq_val = dwq.read()
    num = dwq_val//255
    fill((100,200,50),num)