from machine import Pin
from time import sleep 

ledR = Pin(4,Pin.OUT)
ledG = Pin(16,Pin.OUT)
ledB = Pin(17,Pin.OUT)
 
while True:
    ledR.value(1)
    sleep(5)
    ledR.value(0)
    for i in range (3):
        ledB.value(1)
        sleep(.5)
        ledB.value(0)
        sleep(.5)
    ledG.value(1)
    sleep(5)
    ledG.value(0)