from machine import Pin
import time

red = Pin(2,Pin.OUT)
green = Pin(4,Pin.OUT)
blue = Pin(16,Pin.OUT)

while True:
    red.value(1)
    green.value(0)
    blue.value(0)
    print("Red is on")
    time.sleep(0.5)

    red.value(0)
    green.value(1)
    blue.value(0)
    print("Green is on")
    time.sleep(0.5)

    red.value(0)
    green.value(0)
    blue.value(1)
    print("Blue is on")
    time.sleep(0.5)

    red.value(1)
    green.value(1)
    blue.value(1)
    print("White is on")
    time.sleep(0.5)