from machine import Pin
import utime

led_R=Pin(5,Pin.OUT)
led_O=Pin(9,Pin.OUT)
led_G=Pin(12,Pin.OUT)

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

     led_G.value(1)
     utime.sleep(1)
     led_G.value(0) 
     utime.sleep(1)