from machine import Pin
from time import sleep


pinR = Pin(1, Pin.OUT)
pinG = Pin(2, Pin.OUT)
pinB = Pin(3, Pin.OUT)

def turn_off_all():
    pinR.value(1)
    pinG.value(1)
    pinB.value(1)

def red():
    turn_off_all()
    pinR.value(0)

def green():
    turn_off_all()
    pinG.value(0)

def blue():
    turn_off_all()
    pinB.value(0)

def display_colors():
    while True:
        red()
        sleep(1)
        green()
        sleep(1)
        blue()
        sleep(1)

display_colors()