C++ Basic Game of Life

#include <iostream>
#include <Windows.h>
#include <cstdlib>
#include <ctime>
using std::cout;
using std::endl;

const unsigned int WIDTH = 1000;
const unsigned int HEIGHT = 1000;
const unsigned char LIFE = '1';
const unsigned char DEATH = ' ';

unsigned char LifeBoard[WIDTH][HEIGHT];
unsigned char LifeBoardCopy[WIDTH][HEIGHT];

void ClearBoard()
{
    for (int i=0; i<WIDTH; i++)
        for (int j=0; j<HEIGHT; j++)
            LifeBoard[i][j] = DEATH;
}

void GenerateBoard()
{
    for (int i=0; i<WIDTH; i++)
        for (int j=0; j<HEIGHT; j++)
           LifeBoard[i][j] = rand() % 2 == 0 ? LIFE : DEATH;
    //ClearBoard();
    //LifeBoard[1][1] = LIFE;
    //LifeBoard[1][2] = LIFE;
    //LifeBoard[1][3] = LIFE;
}

void PrintBoard()
{
    system("cls");
    system("color 02");
    for (int i=0; i<WIDTH; i++)
    {
        for (int j=0; j<HEIGHT; j++)
            cout << LifeBoard[i][j];
        cout << endl;
    }
}

void CopyBoard()
{
    for (int i=0; i<WIDTH; i++)
        for (int j=0; j<HEIGHT; j++)
            LifeBoardCopy[i][j] = LifeBoard[i][j];
}

void CopyBoardReverse()
{
    for (int i=0; i<WIDTH; i++)
        for (int j=0; j<HEIGHT; j++)
            LifeBoard[i][j] = LifeBoardCopy[i][j];
}

bool IsBoardEmpty()
{
    for (int i=0; i<WIDTH; i++)
        for (int j=0; j<HEIGHT; j++)
            if (LifeBoard[i][j] == LIFE) return false;
    return true;
}

void UpdateBoard()
{
    int celle_adiacenti = 0;
    for (int i=0; i<WIDTH; i++)
    {
        for (int j=0; j<HEIGHT; j++)
        {
            for (int k=0; k<8; k++)
            {
                if (k==0)
                    if (j-1 >= 0)
                        if (LifeBoard[i][j-1] == LIFE)
                            celle_adiacenti++;
                if (k==1)
                    if (i+1 < WIDTH && j-1 >= 0)
                        if (LifeBoard[i+1][j-1] == LIFE)
                            celle_adiacenti++;
                if (k==2)
                    if (i+1 < WIDTH)
                        if (LifeBoard[i+1][j] == LIFE)
                            celle_adiacenti++;
                if (k==3)
                    if (i+1 < WIDTH && j+1 < HEIGHT)
                        if (LifeBoard[i+1][j+1] == LIFE)
                            celle_adiacenti++;
                if (k==4)
                    if (j+1 < HEIGHT)
                        if (LifeBoard[i][j+1] == LIFE)
                            celle_adiacenti++;
                if (k==5)
                    if (i-1 >= 0 && j+1 < HEIGHT)
                        if (LifeBoard[i-1][j+1] == LIFE)
                            celle_adiacenti++;
                if (k==6)
                    if (i-1 >= 0)
                        if (LifeBoard[i-1][j] == LIFE)
                            celle_adiacenti++;
                if (k==7)
                    if (i-1 >= 0 && j-1 >= 0)
                        if (LifeBoard[i-1][j-1] == LIFE)
                            celle_adiacenti++;
            }
            if (LifeBoard[i][j] == DEATH)
                if (celle_adiacenti == 3)
                    LifeBoardCopy[i][j] = LIFE;
            if (LifeBoard[i][j] == LIFE)
            {
                if (celle_adiacenti < 2)
                    LifeBoardCopy[i][j] = DEATH;
                if (celle_adiacenti == 2 || celle_adiacenti == 3)
                    LifeBoardCopy[i][j] = LIFE;
                if (celle_adiacenti > 3)
                    LifeBoardCopy[i][j] = DEATH;
            }
            celle_adiacenti = 0;
        }
    }
    CopyBoardReverse();
}

int main()
{
    srand((unsigned)time(0));
    GenerateBoard();
    CopyBoard();
    PrintBoard();

    while (!IsBoardEmpty())
    {
        UpdateBoard();
        PrintBoard();
        Sleep(250);
    }
    return 0;
}