用Arduino uno把一个温度湿度感应器（DHT11）和一个三色LED连接起来后， 使用这段代码读取湿度并不同湿度区间内LED会展现不同颜色， 可调节。(Connecting an Arduino uno with a Humidity and temperature sensor(DHT11) with a 3-color LED. Using this code to extract the humidity value and show it on a LED by different