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module top (
input clk,
output LED1,
output LED2,
output LED3,
output LED4,
output LED5
);
localparam BITS = 5;
localparam LOG2DELAY = 22;
function [BITS-1:0] bin2gray(input [BITS-1:0] in);
integer i;
reg [BITS:0] temp;
begin
temp = in;
for (i=0; i<BITS; i=i+1)
bin2gray[i] = ^temp[i +: 2];
end
endfunction
reg [BITS+LOG2DELAY-1:0] counter = 0;
always@(posedge clk)
counter <= counter + 1;
assign {LED1, LED2, LED3, LED4, LED5} = bin2gray(counter >> LOG2DELAY);
endmodule
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