gistfile1.js

var Game = (function () {

    var _grid;

    var init = function (size) {
        _grid = [];
        for (var x = size - 1; x >= 0; x--) {
            var row = [];
            for (var y = size - 1; y >= 0; y--) {
                row.push(0);
            }
            _grid.push(row);
        }
    }

    var grid = function () {
        return _grid;
    };    

    return function(size) {
        
        init(size);

        return {
            grid: grid
        };
    };
})();