`timescale 1ns / 1ps
//////////////////////////////////////////////////////////////////////////////////
// Company: 
// Engineer: 
// 
// Create Date:    14:21:53 03/16/2012 
// Design Name: 
// Module Name:    Increment 
// Project Name: 
// Target Devices: 
// Tool versions: 
// Description: 
//
// Dependencies: 
//
// Revision: 
// Revision 0.01 - File Created
// Additional Comments: 
//
//////////////////////////////////////////////////////////////////////////////////
module Increment(
    input btn,
	 input rst,
    output [3:0] value
    );

reg [3:0] value = 0;

always @ ( posedge btn or posedge rst) begin
	if (rst)
		value <= 0;
	else
		value <= value == 4'd9 ? 4'd0 : value + 4'd1;
end

endmodule