cycleThroughNumberPattern.js

function cycle(...args) {
  let [x,y] = [...args]
  let els = Array.isArray(x) ? x : typeof y === 'undefined' ? [x] : [...filler(x,y)]
  let index = 0;
  return {
    next: function() {
      if (index === els.length)
        index = 0;
      return { value: els[index++], done: false };
    }
  };
}
function cycleThroughNumberPattern(x,y, n) {
  return take(n, cycle(x,y));
}