'''
实验名称：点亮第1个LED
实验平台：核桃派
'''
import time

# 导入相关模块
import board
from digitalio import DigitalInOut, Direction
# 构建LED对象和初始化
while True:
    led = DigitalInOut(board.LED)  # 定义引脚编号
    led.direction = Direction.OUTPUT  # IO为输出
    led.value = 0  # 输出低电平，熄灭板载LED蓝灯
    print("熄灭")
    time.sleep(20)
    led.value = 1  # 输出高电平，点亮板载LED蓝灯
    print("点亮")
    time.sleep(20)