from machine import Pin
import time

led = Pin(2, Pin.OUT)

print("กำลังเริ่ม...")
for i in range(5, 0, -1):
    print(i)
    led.on()
    time.sleep(0.3)
    led.off()
    time.sleep(0.7)

    for count in range(10, -1, -1):
        print("เหลือเวลา:", count)

        delay = max(0.05, 0.5 * count / 10)

        duration = 1.0
        elapsed = 0
        while elapsed < duration:
            led.on()
            time.sleep(delay)
            led.off()
            time.sleep(delay)
            elapsed += delay * 2

print("เริ่มแล้ว!")
led.on()