text: 
  // You should implement your task here.
  
  module.exports = function towelSort (matrix) {
    let mass=[];
    if (!matrix || matrix.length<1 ) return mass;
    for (let i=0; i<matrix.length; i++)
    {
        if(i%2!=0) matrix[i].reverse();
      for (let j=0; j<matrix[i].length;j++)
      {
        mass.push(matrix[i][j]);
      }
    }
    return mass;
  }
  