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.

`default_nettype none
`timescale 1ns/1ns

// Inner module: process_signal
module process_signal (
    input wire clk,         // 1 kHz clock
    input wire reset,
    input wire signal1,
    input wire signal2,
    input wire signal3,
    output reg out
);
// >>> Module Implementation Begin

// <<< Module Implementation End
endmodule



//A clock divider
`default_nettype none
`timescale 1ns/1ns
module clock_divider_1khz (
    input wire clk_in,     // 100 MHz input clock
    input wire reset,
    output reg clk_out     // 1 kHz output clock
);

reg [16:0] counter = 0;    // 17 bits is enough for counting to 100,000

parameter DIVISOR = 100_000;  // 100 MHz → 1 kHz

always @(posedge clk_in or posedge reset) begin
    if (reset) begin
        counter <= 0;
        clk_out <= 0;
    end else begin
        if (counter == (DIVISOR / 2 - 1)) begin
            clk_out <= ~clk_out;   // Toggle clock output
            counter <= 0;
        end else begin
            counter <= counter + 1;
        end
    end
end

endmodule

// Top-Level Module That Connects Sensors and clock divider
`default_nettype none
`timescale 1ns/1ns
module stress_sensor(
    input wire clk,          // 1 kHz clock
    input wire reset,
    input wire sensor1,
    input wire sensor2,
    input wire sensor3,
    output wire response
);

wire signal_out;

// Internal 1 kHz clock wire
wire clk_1khz ;

// Instantiate clock divider
clock_divider_1khz clkdiv (
    .clk_in(clk),
    .reset(reset),
    .clk_out(clk_1khz)
);

process_signal sensor_logic (
    .clk(clk_1khz),
    .reset(reset),
    .signal1(sensor1),
    .signal2(sensor2),
    .signal3(sensor3),
    .out(signal_out)
);

assign response = signal_out;

endmodule


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

`default_nettype none

module tt_um_stress_sensor (
    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
);

    // Create a new reset; inverting.
    wire reset = ~rst_n;
    
    // Map first 3 bits of ui_in to the inputs
    wire sensor1 = ui_in[0];
    wire sensor2 = ui_in[1];
    wire sensor3 = ui_in[2];

    wire response ;
    
    // Instantiate the original top module stress_sensor
    stress_sensor to_tt (
        .clk(clk),
        .reset(reset),
        .sensor1(sensor1),
        .sensor2(sensor2),
        .sensor3(sensor3),
    	.response(response)
    );
    
    // Tie off the unused outputs
    assign uo_out = {7'b0, response};

    assign uio_out     = 8'b0;   // don't drive bidirectional pins
    assign uio_oe      = 8'b0;   // keep bidirectional pins as inputs (disabled)
   

    // Silence unused input warnings
    wire _unused = &{uio_in, ena, ui_in[7:3], 1'b0};

endmodule


Reference solution:
rtl/generated.v: 
reg [15:0] timer1 = 0;
reg [15:0] timer2 = 0;
reg [15:0] timer3 = 0;

always @(posedge clk or posedge reset) begin
    if (reset) begin
        timer1 <= 0;
        timer2 <= 0;
        timer3 <= 0;
    end else begin
        if (signal1)
            timer1 <= 16'd60000;
        else if (timer1 > 0)
            timer1 <= timer1 - 1;

        if (signal2)
            timer2 <= 16'd60000;
        else if (timer2 > 0)
            timer2 <= timer2 - 1;

        if (signal3)
            timer3 <= 16'd60000;
        else if (timer3 > 0)
            timer3 <= timer3 - 1;
    end
end

always @(*) begin
    out = 1'b0; //default 
    if ((timer1 > 0) && (timer2 > 0) && (timer3 > 0))
    	out = 1'b1;
end