from machine import Pin
import time

r = Pin(2,Pin.OUT)
g = Pin(3,Pin.OUT)
b = Pin(4,Pin.OUT)

while True:
  r.toggle()
  time.sleep(0.1)
  r.toggle()
  g.toggle()
  time.sleep(0.1)
  g.toggle()
  b.toggle()
  time.sleep(0.1)
  b.toggle()