Game of Life in javascript

game of life.js

var grid = initGrid(30, 30);
printGrid(grid);
startGame();

function startGame() {

    (function generation(generations) {
        setTimeout(function() {

            var tempGrid = initGrid(30, 30);

            for (var i = 0; i < grid.length; i++) {
                for (var j = 0; j < grid[i].length; j++) {
                    if (grid[i][j] == 1 || grid[i][j] == 0) {
                        var neighbors = countNeighbors(i, j);
                        if (grid[i][j] == 1 && (neighbors < 2 || neighbors > 3)) {
                            tempGrid[i][j] = 0; // DIE
                        } else if ((grid[i][j] == 0) && neighbors == 3) {
                            tempGrid[i][j] = 1; // LIVE
                        }
                    }
                }
            }

            for (i = 0; i < grid.length; i++) {
                for (j = 0; j < grid[i].length; j++) {
                    if (grid[i][j] != 2)
                        grid[i][j] = tempGrid[i][j];
                }
            }
            printGrid(grid);
            if (--generations) generation(generations);
        }, 150)
    })(30000);

    function countNeighbors(row, col) {
        var neighbors = 0;
        for (var j = col - 1; j < (col + 2); j++) {
            for (var i = row - 1; i < (row + 2); i++) {
                if (i > 0 && j > 0 && j < grid.length && i < grid.length) {
                    if (grid[i][j] !== undefined)
                        neighbors += grid[i][j];
                }
            }
        }
        return neighbors;
    }
}


function initGrid(rows, cols, randomNumbersQuantity) {
    var grid = [];
    var randomNumbers = getRandomNumbers(randomNumbersQuantity);

    for (var i = 0; i < rows; i++) {
        var row = [];
        for (var j = 0; j < cols; j++) {
            if (i == 0 || i == (rows - 1) || j == (cols - 1) || j == 0) {
                row.push(2);
            } else {
                row.push(0);
            }
        }
        grid.push(row);
    }
    if (randomNumbersQuantity > 0) {
        for (var i = 0; i < randomNumbers.length; i++) {
            var numbers = randomNumbers[i];
            grid[numbers.x][numbers.y] = 1;
        }
    } else {
        for (var i = 0; i < rows; i++) {
            for (var j = 0; j < cols; j++) {
                if (grid[i][j] == 0) {
                    /*
                    if (j == 15){
                      if (i >= 2 && i <= 15){
                        grid[i][j] = 1;
                        grid[i+9][j] = 1;
                        grid[i+15][j] = 1;
                      }
                    }

                    if (j == 10){
                      if (i >= 2 && i <= 15){
                        grid[i][j] = 1;
                        grid[i+9][j] = 1;
                        grid[i+15][j] = 1;
                      }
                    }
                    if (j == 5){
                      if (i >= 2 && i <= 15){
                        grid[i][j] = 1;
                        grid[i+9][j] = 1;
                        grid[i+15][j] = 1;
                      }
                    }

                    if (j == 20){
                      if (i >= 2 && i <= 15){
                        grid[i][j] = 1;
                        grid[i+9][j] = 1;
                        grid[i+15][j] = 1;
                      }
                    } */

                    /* Talking Face */
                    if (i == 14) {
                        if (j > 10 && j < 20) {
                            grid[i][j] = 1;
                        }
                    }

                    if (j == 10) {
                        if (i >= 8 && i <= 10) {
                            grid[i][j] = 1;
                        }
                    }

                    if (j == 15) {
                        if (i >= 8 && i <= 10) {
                            grid[i][j] = 1;
                        }
                    }

                    if (j == 20) {
                        if (i >= 8 && i <= 10) {
                            grid[i][j] = 1;
                        }
                    }

                }
            }
        }
    }

    return grid;

    function getRandomNumbers(numbers) {
        var randomNumbers = [];

        var size = 0;
        while (size < numbers) {

            var Numbers = {};
            for (var i = 0; i < 2; i++) {
                if (i == 0)
                    Numbers.x = Math.floor(Math.random() * 29) + 1;
                else
                    Numbers.y = Math.floor(Math.random() * 29) + 1;
            }

            var repeated = false;
            for (var i = 0; i < randomNumbers.length; i++) {
                if (randomNumbers[i].x == Numbers.x && randomNumbers[i].y == Numbers.y) {
                    repeated = true;
                }
            }

            if (!repeated) {
                randomNumbers.push(Numbers);
                size++;
            }
        }

        return randomNumbers;
    }
}

function printGrid(grid) {
    for (var i = 0; i < grid.length; i++) {
        var rowData;
        for (var j = 0; j < grid[i].length; j++) {
            if (rowData == undefined)
                rowData = '';
            if (grid[i][j] == 2) {
                if (i == 0 || i == (grid.length - 1))
                    rowData += ' > ';
                else
                    rowData += ' V ';
            } else {
                if (grid[i][j] == 0)
                    rowData += ' . ';
                else
                    rowData += ' * ';
            }
            if (j == grid.length - 1) {
                rowData += '\n'
            }
        }
    }
    console.log(rowData);
}