from machine import Pin
import time

led_r = Pin(19,Pin.OUT)
led_g = Pin(18,Pin.OUT)
led_b = Pin(5,Pin.OUT)

while True:
    led_r.value(1)
    led_g.value(0)
    led_b.value(0)
    time.sleep(1)

    led_r.value(1)
    led_g.value(1)
    led_b.value(0)
    time.sleep(1)

    led_r.value(1)
    led_g.value(0)
    led_b.value(1)
    time.sleep(1)

    led_r.value(0)
    led_g.value(1)
    led_b.value(0)
    time.sleep(1)