from machine import Pin, ADC
from time import sleep 
import neopixel
from random import randrange as rnd
 
button1 = Pin(34, Pin.IN, Pin.PULL_UP)
button = Pin(35, Pin.IN, Pin.PULL_UP)
nl=16
leds = neopixel.NeoPixel(Pin(23), nl)
pot1 = ADC(Pin(13)) 


index=0
while True:
    btn1 = bool(button1.value())
    if btn1 == True:
        barv = [rnd(255), rnd(255), rnd(255)]
        if index >= 16:
            index = 0
        btn = bool(button.value())
        if btn == True:
            for i in range(nl):
                index += 1
                leds[i] = barv
                if btn:
                    delay_time=max(pot1.read() / 4095 * 2, 0.1)
                    leds.write() 
                    sleep(delay_time)
                leds[i]= [0, 0, 0]

        for i in range(nl):
            leds[i] = barv
        leds.write()
        delay_time=max(pot1.read() / 4095 * 2, 0.1)
        sleep(delay_time)
    else:
        for i in range(nl):
            leds[i]=[0, 0, 0]
        leds.write()