from machine  import Pin
import utime
import random

red = Pin(19, Pin.OUT)
green = Pin(5, Pin.OUT)
blue = Pin(2, Pin.OUT)

while True:
  red.value(random.randint(0, 1))
  green.value(random.randint(0, 1))
  blue.value(random.randint(0, 1))
  utime.sleep(3)