from machine import Pin
import time

ledRED = Pin(14, Pin.OUT)
ledGREEN = Pin(15, Pin.OUT)

while True :
    ledRED. value(1)
    ledGREEN. value(0)
    print("RED LED on")
    print("GREEN LED off")
    print("-----------")
    time.sleep(3)

    ledGREEN. value(1)
    ledRED. value(0)
    print("GREEN LED on")
    print("RED LED off")
    print("-----------")
    time.sleep(3)