写代码，并将引脚对应到板子相应的引脚上

下载程序到板子上

遇到错误了，不按想的来的了，进行仿真

查看网表图查看问题所在 

简化了一些步骤：未使用引脚的设置，电压设置；

通过画网表结构图来构成电路 

时钟 计数

input clk;

reg [24:] count;

always@(posedge clk)

        count = count +1;

module myled3(input clk,output reg[7:0] led);

reg[24:0] count;
reg[2:0] count2;


always@(posedge clk)
begin
	count = count+1;
end

always@(posedge clk)
begin
	if(count == 25'hfff)
		count2 = count2 +1;
	case(count2)
		0:led = 0;
		1:led = 1;
		2:led = 'b10;
		3:led = 'b100;
		4:led = 'b1000;
		5:led = 'b10000;
		6:led = 'b100000;
		default:
		led = 'b11111111;
	endcase
		
end

endmodule

使用计时器 进行状态判断与顺序执行