from machine import Pin
import utime
import random

red = Pin(16, Pin.OUT)
green = Pin(17, Pin.OUT)
blue = Pin(18, Pin.OUT)

while True:
    red.value(random.randint(0,1))
    green.value(random.randint(0,1))
    blue.value(random.randint(0,1))
    utime.sleep(0.3)