收集了很多好的风格及代码的指导准则供参考，遵守这些代码风格及代码指导准则可以提高VHDL程序的可读性，且易于修改。-collected a lot of good style and code guidelines for reference, compliance with these codes and code style guidelines VHDL procedures can improve the readability and easy to change.

用VHDL能进行正常的时、分、秒计时功能、分别有6个数码管显示24小时、60分钟、60秒钟的计数器显示。-VHDL can be used for normal hours, minutes and seconds timing were six LED display 24 hours 60 minutes, 60 seconds showed that the counter.