text: function shuffle(a) {
      let n = a.length;
      for (let i = 0; i < n; i++) {
          let swap = i + Math.floor(Math.random() * (n - i - 1));
          let aux = a[i];
          a[i] = a[swap];
          a[swap] = aux;
      }
  }
  
  let array = [5, 3, 1, 4, 2];
  shuffle(array);
  for (let i = 0; i < array.length; i++) console.log(array[i]);
  
  //https://pt.stackoverflow.com/q/402427/101
  