from machine import Pin 
from utime import sleep

red = Pin(2, Pin.OUT)
green = Pin(3, Pin.OUT)
blue = Pin(4, Pin.OUT)
print('hello')

red.value(1)
green.value(1)
blue.value (1)

while True:
    red.toggle()
    sleep(1)
    red.toggle()
    green.toggle()
    sleep(1)
    green.toggle()
    blue.toggle()
    sleep(1)
    blue.toggle()