用Verilog语言编写的一些简单的FPGA入门实验，用ALTERA DE2开发板和Quartus_II软件开发环境。包括：流水灯实验、数码管显示实验-With Verilog language preparation some simple introduction experiment, with FPGA ALTERA DE2 development board and Quartus_II software development environment. Include water l