from machine import Pin, ADC, PWM
from time import sleep
from random import getrandbits 

print("\n ##### Iniciando ######\n")

getrandbits(10)

led1 = PWM(Pin(23), freq=20000, duty=0)
led2 = PWM(Pin(22), freq=20000, duty=0)
led3 = PWM(Pin(21), freq=20000, duty=0)
while True:
    for valor in range(1024):
        led1.duty(getrandbits(1))
        led2.duty(getrandbits(10))
        led3.duty(getrandbits(10))
        sleep(0.01)
    led1.duty(0)
    led2.duty(0)
    led3.duty(0)
    sleep(0.5)