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

print("\n ###### INÍCIO ###### ")

red = PWM(Pin(4), freq=1000, duty=0) # não precisa do duty (neste momento) nesse local
green = PWM(Pin(16), freq=1000, duty=0)
blue = PWM(Pin(17), freq=1000, duty=0)

while True:
    red.duty(getrandbits(10))
    green.duty(getrandbits(10))
    blue.duty(getrandbits(10))
    sleep(3)