code: function init(version) {
      var N = version * 4 + 17;
      var matrix = [];
      var zeros = new Buffer(N);
      zeros.fill(0);
      zeros = [].slice.call(zeros);
      for (var i = 0; i < N; i++) {
          matrix[i] = zeros.slice();
      }
      return matrix;
  }
docs: {{{1 Initialize matrix with zeros