from machine import Pin
import time

# 設定LED引腳，假設使用GPIO 2
led1 = Pin(2, Pin.OUT) #red
led2 = Pin(14, Pin.OUT) #yellow
led3 = Pin(22, Pin.OUT) #green

while True:
    led1.on()  # 開啟LED
    time.sleep(2)  # 等待1秒
    led1.off()  # 關閉LED
    
    led2.on()  # 開啟第二顆LED
    time.sleep(1)  # 等待
    led2.off()  # 關閉第二顆LED
   
    led3.on()  # 開啟第三顆LED
    time.sleep(3)  # 等待
    led3.off()  # 關閉第三顆LED