from machine import Pin
import time

ledR = Pin(5, Pin.OUT)
ledR.value(0)

while True:
    r= int(input('Count Down 횟수 입력 : '))
    time.sleep(2)
    for i in range(r):
        ledR.value(1)
        time.sleep(0.5)
        ledR.value(0)
        time.sleep(0.5)
        print(f'Count Down {r-i}!')
    time.sleep(2)