# กำหนดพินสำหรับไฟแดง ไฟเหลือง และไฟเขียว
from machine import Pin
import time

red_W=Pin(4,Pin.OUT)
yellow_W=Pin(0,Pin.OUT)
green_W=Pin(2,Pin.OUT)

red_N=Pin(23,Pin.OUT)
yellow_N=Pin(22,Pin.OUT)
green_N=Pin(21,Pin.OUT)

red_E=Pin(19,Pin.OUT)
yellow_E=Pin(18,Pin.OUT)
green_E=Pin(17,Pin.OUT)

red_S=Pin(25,Pin.OUT)
yellow_S=Pin(26,Pin.OUT)
green_S=Pin(27,Pin.OUT)

def North_light():
    red_S.on()
    red_E.on()
    red_W.on()
    green_N.on()
    time.sleep(5)

    green_N.off()
    yellow_N.on()
    time.sleep(2)

    yellow_N.off()
    red_S.off()
    red_E.off()
    red_W.off()

def South_light():
    red_N.on()
    red_E.on()
    red_W.on()
    green_S.on()
    time.sleep(5)

    green_S.off()
    yellow_S.on()
    time.sleep(2)

    yellow_S.off()
    red_N.off()
    red_E.off()
    red_W.off()

def East_light():
    red_N.on()
    red_S.on()
    red_W.on()
    green_E.on()
    time.sleep(5)

    green_E.off()
    yellow_E.on()
    time.sleep(2)

    yellow_E.off()
    red_N.off()
    red_S.off()
    red_W.off()

def West_light():
    red_N.on()
    red_E.on()
    red_S.on()
    green_W.on()
    time.sleep(5)

    green_W.off()
    yellow_W.on()
    time.sleep(2)

    yellow_W.off()
    red_N.off()
    red_E.off()
    red_S.off()

while True:
    South_light()
    North_light()
    East_light()
    West_light()