[рони]

<script>
  "use strict"
let arr = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14];

function shuffleArray() {
    let array = this.slice(0);
    for (let i = array.length - 1; i > 0; i--) {
        let j = Math.random() * i|0;
        [array[i], array[j]] = [array[j], array[i]];
    }
    return array;
}
function makeMultiArr(num, arr) {
            return Array.from({length : num},  shuffleArray, arr)
        }

document.write(JSON.stringify(makeMultiArr(5, arr)))

  </script>