node console spinner (rough)

spin.js

var arr = [
  '\\',
  '|',
  '/',
  '-',
]
, position = 0;

arr = arr.concat(arr, arr, arr, arr, arr, arr);

var spinerval = setInterval(function () {
  var spin = arr[position];

  if(position > 0) {
    spin = '\b' + spin;
  }

  process.stdout.write(spin);
  position++;

  if (position === arr.length) {
    clearInterval(spinerval);
    process.stdout.write('\b' + '');
  }

}, 50);

Can I play too?

function* spinner() {
  yield '\\';
  yield '|';
  yield '/'
  yield '-';
  yield *spinner();
}

let s = spinner();
setInterval( ()=>process.stdout.write("\b" + s.next().value), 30)