from machine import Pin
import utime

led_R = Pin(5,Pin.OUT)
led_O = Pin(9,Pin.OUT)
led_G = Pin(13,Pin.OUT)

while True:
    led_R.value (1)
    utime.sleep (1)
    led_R.value (0)
    utime.sleep (1)
    
    led_O.value (1)
    utime.sleep (1)
    led_O.value (0)
    utime.sleep (1)
    
    led_G.value (1)
    utime.sleep (1)
    led_G.value (0)
    utime.sleep (1)