from machine import Pin,ADC
from time import sleep
import neopixel
import random
pot1= ADC(Pin(26))
pot2= ADC(Pin(33))
pot3= ADC(Pin(27))
btn = Pin(18,Pin.IN, Pin.PULL_UP)
 
NUM_LED = 16
leds = neopixel.NeoPixel(Pin(4), NUM_LED)

while True:

    btnVal = not bool(btn.value())
    if btnVal == False:
        barva= [random.randrange(0,255),random.randrange(0,255),random.randrange(0,255)]
        for i in range(NUM_LED):
            leds[i-1]=[0,0,0]
            leds[i]=barva
            sleep(max(pot1.read()/10000,0.1))
            leds.write()
    else:
        for i in range(NUM_LED):
            leds[i]=[0,0,0]
            leds.write()