module Running_Lights(CIk,rst,led,
cTk;
input rst;
output[3:01led;
reg[3:0] led;
reg[31:0]timer;
always@(posedge clk or negedge rst) abegin
if(rst==1'b0)
timerf32doi3zd199 999_999)else if (timer
timer <= 32'd0;
else
timer <= timer + 32'd1;
end
always@(posedge clk or negedge rst) begin
if(rst== 1'b0)
ed心= booo0;
elseif(timer —3210491999_999)
led
ctingPoo1i
else led if一 321099 999.1999)
b0010;
elseif (timer 92 d149_993_999)else led<=4 b0100;
if(timer 32'd199_999_999)
end led<=4 b1000;
endmodule
实在找不出问题出哪儿啦???