function Save(modules) {
  var save = JSON.parse(localStorage.getItem('save')) || {};

  return {
    get: get,
    set: set
  };

  function move(coordinates) {
    if(coordinates.path.length == 1) {
      return coordinates;
    } else {
      var newFocus = coordinates.focus[coordinates.path[0]];
      if (newFocus != undefined) {
        var newCoordinates = {path: coordinates.path.slice(1), focus: newFocus};
        return move(newCoordinates);
      } else {
        return coordinates;
      }
    }
  }

  function get(key) {
    if(key != undefined) {
      var outputCoordinates = move({path: key.split('.'), focus: save});
      if(outputCoordinates.focus != undefined && outputCoordinates.path.length == 1) {
        return outputCoordinates.focus[outputCoordinates.path[0]]
      } else {
        return null;
      }
    }
  }

  function set(key, value) {
    if(key != undefined) {
      var outputCoordinates = move({path: key.split('.'), focus: save});
      while(outputCoordinates.path.length > 1) {
        outputCoordinates.focus[outputCoordinates.path[0]] = {};
        outputCoordinates.focus = outputCoordinates.focus[outputCoordinates.path[0]];
        outputCoordinates.path = outputCoordinates.path.slice(1);
      }
      outputCoordinates.focus[outputCoordinates.path[0]] = value;
    } else {
      save = value;
    }
    localStorage.setItem('save', JSON.stringify(save));
  }
}