marius-m2

(function () {
  var cells = document.querySelectorAll('.cell');
  var currentLevel = 0;
  var arrayCells = new Array(new Array(), new Array(), new Array(), new Array());

  [].forEach.call(cells, function (item, i) {
    if (i % 4 === 0 && i !== 0) {
      currentLevel += 1;
    }
    arrayCells[currentLevel].push(item);