text: 
  // You should implement your task here.
  
  module.exports = function towelSort (matrix) {
    if(typeof matrix != "object") return [];
    let rez = [];
      for(let i = 0; i<matrix.length; i++){
        if(i%2 == 0)
          for(let j = 0; j < matrix[i].length; j++){
              rez.push(matrix[i][j]);
          }
          else
          for(let j = matrix[i].length-1; j >= 0; j--){
            rez.push(matrix[i][j]);
        }
  
  }
  return rez;
    //return [];
  }
  