一个VHDL的多媒体教室。功能为：

1、当接近玻璃门，玻璃门会自动打开，可进入教室。

2、屏幕旁边的的四个按钮负责灯的开关、窗帘的开关、投影仪的升降以及电影的播放。

3、单击笔记本可以负责笔记本的打开和关闭。-A VHDL multimedia classroom. Function: 1, when close to the glass doors, glass doors will automatically open, you can enter the classroom. 2, the four buttons next to the screen responsible for the light switch, the switch curtains, projector lift, and movie playback. 3, click the notebook can be responsible for opening and closing the notebook.