from machine import Pin
from utime import sleep 

red=Pin (15, Pin.OUT)
gren= Pin(2, Pin.OUT)
blue= Pin(0, Pin.OUT)

def colors (r,g,b):
  red.value(r)
  green.value(g)
  blue.value(b)

  while True:
   colors(0,0,0)
   sleep(1)
   colors(0,0,1)
   sleep (1)