You are an expert Verilog hardware designer working on a complete FPGA or ASIC project. You are given the full source code of a Verilog project. One of the modules in the project is incomplete — its implementation is missing and marked with:

// >>> Module Implementation Begin

// <<< Module Implementation End

Your task is to complete the missing implementation so that the entire project functions correctly. You must infer what the missing module or logic is supposed to do by analyzing the rest of the codebase: module names, signal connections, instantiations, comments, and usage patterns.

Follow these rules:

1. Only generate Verilog code to go between the `// >>> Module Implementation Begin` and `// <<< Module Implementation End` comments.
2. Use Verilog-2001 syntax. Ensure the code is synthesizable.
3. Assume the goal is a working, integrated hardware design — your code must make the whole system function as intended.
4. Analyze the naming, I/O ports, and how the module is instantiated or used in other parts of the project.
5. Implement correct behavior based on design context. Do not guess randomly — reason it out.
6. Avoid vendor-specific features unless explicitly required.
7. Do not output comments, explanation, or anything outside the required code region unless explicitly asked.

Your output should contain **only the Verilog code** that fits inside the marked region.

/*
 * Copyright (c) 2024 Your Name
 * SPDX-License-Identifier: Apache-2.0
 */

`default_nettype none

module tt_um_richardgonzalez_ped_traff_light (
    input  wire [7:0] ui_in,    // Dedicated inputs
    output wire [7:0] uo_out,   // Dedicated outputs
    input  wire [7:0] uio_in,   // IOs: Input path
    output wire [7:0] uio_out,  // IOs: Output path
    output wire [7:0] uio_oe,   // IOs: Enable path (active high: 0=input, 1=output)
    input  wire       ena,      // always 1 when the design is powered, so you can ignore it
    input  wire       clk,      // clock
    input  wire       rst_n     // reset_n - low to reset
);


wire rst = ! rst_n;
assign uio_oe = 8'b0000_0000;
assign uio_out = 8'b0000_0000;
assign uo_out[7:4] = 4'b0000;
wire unused_ena = ena;
wire [7:0] unused_ui_in = ui_in;
wire [7:0] unused_uio_in = uio_in;

//wire green_light, red_light;
//wire [1:0] countdown;

 ped_traff_light ped_light (
	.clk(clk),
	.reset(rst),
	.green_light(uo_out[0]),
	.red_light(uo_out[1]),
	.countdown(uo_out[3:2])
); 

//assign uo_out[0] = green_light;
//assign uo_out[1] = red_light;
//assign uo_out[3:2] = countdown;
//assign uo_out[7:4] = 4'b0000

endmodule


module ped_traff_light (
	input wire clk,
	input wire reset,
	output wire green_light,
	output wire red_light,
	output wire [1:0] countdown
);


wire tick;

clock_divider my_divider (
	.clk(clk),
	.reset(reset),
	.tick(tick)
);

light_clock my_light_clock (
	.tick(tick),
	.reset(reset),
	.green_light(green_light),
	.red_light(red_light),
	.countdown(countdown)
);

endmodule



module light_clock (
	input wire tick,
	input wire reset,
	output reg green_light,
	output reg red_light,
	output reg [1:0] countdown // shows 3,2,1, may change to a countdown from 10
);
// >>> Module Implementation Begin

// <<< Module Implementation End
endmodule




module clock_divider (
	input wire clk,
	input wire reset,
	output reg tick
);

reg [23:0] counter;

always @(posedge clk or posedge reset) begin
	if (reset) begin
		counter <= 0;
		tick <= 0;
	end else begin
		if (counter == 15) begin
			tick <= 1;
			counter <= 0;
		end else begin
			tick <= 0;
			counter <= counter + 1;
		end
	end
end

endmodule


Reference solution:
rtl/generated.v: 
reg mode; //0 will equal green, and 1 will equal red


always @(posedge tick or posedge reset) begin
	if (reset) begin 
		mode <= 0; //green
		countdown <= 3;
	end else begin
		if (countdown == 0) begin
			mode <= ~mode; //switch
			countdown <=3;
		end else begin
			countdown <= countdown -1;
		end
	end
end



always @(*) begin
	case (mode)
		0:begin
			green_light = 1;
			red_light = 0;
		end
		1: begin
			green_light = 0;
			red_light = 1;
		end
	endcase
end