text: function createMat(ROWS, COLS) {
      var mat = []
      for (var i = 0; i < ROWS; i++) {
          var row = []
          for (var j = 0; j < COLS; j++) {
              row.push('')
          }
          mat.push(row)
      }
      return mat
  }
  
  
  
  function getRandomInteger(min, max) {
      var randNum = Math.floor(Math.random() * (max - min + 1)) + min;
      return randNum;
  }