from machine import Pin
import utime

# Define the LEDs
greenled = Pin(15, Pin.OUT)
yellowled = Pin(13, Pin.OUT)
redled = Pin(12, Pin.OUT)

while True:
    # GREEN LED On
    greenled.value(1)
    utime.sleep(5)
    greenled.value(0)  # GREEN LED Off
    
    # YELLOW LED On
    yellowled.value(1)
    utime.sleep(5)
    yellowled.value(0)  # YELLOW LED Off
    
    # RED LED On
    redled.value(1)
    utime.sleep(5)
    redled.value(0)  # RED LED Off