from machine import Pin
import time

# 設定LED引腳
led_pins = [22, 2, 9]
leds = [Pin(pin, Pin.OUT) for pin in led_pins]

# 設定LED閃爍頻率
frequencies = [1, 2, 4]  # Hz
periods = [1 / freq for freq in frequencies]  # 每個LED的週期

while True:
    current_time = time.ticks_ms() / 1000  # 獲取當前時間，轉換為秒

    for i in range(len(leds)):
        # 計算當前時間點LED應該的狀態（利用正弦函數週期特性）
        if int(current_time * frequencies[i]) % 2 == 0:
            leds[i].value(1)  # 開啟LED
        else:
            leds[i].value(0)  # 關閉LED

    # 短暫休眠以減少CPU佔用
    time.sleep(0.01)