from machine import ADC,Pin
from utime import sleep
import neopixel
import time
num_led=16
led=neopixel.NeoPixel(Pin(5),num_led)
gumb=Pin(4,Pin.IN,Pin.PULL_UP)
while True:
    i = 1
    up = True
    led[0]=[0,255,0]
    led.write()
    for i in range(num_led):
        if gumb.value() == False and up:
            led[i] = (255,0,0)
            led.write()
            i += 1
            up = False
        if gumb.value() == True:
            up = True
        sleep(0.01)