闹钟，能够获取当前电脑上的时间，并且动态显示当前时间，设置闹钟，然后到点会播放选择的音乐。（注意music 这个文件夹应该放在项目目录下，根src同一个目录级别）-Alarm clock, to get the current time on the computer, and dynamically displays the current time, set the alarm, and then point to play the selected music. (Pay attention to music in this folder should be placed in the project directory, the root src same directory level)