Edit in JSFiddle

var counter = 0,
  christmas = ['none', 'block'],
  el_rec = document.getElementById('rec'),
  interval = setInterval(() => {
    counter++ % (2016 / (12 * 24)) === 0 &&
    christmas.unshift(christmas.pop()) &&
    (el_rec.style.display = christmas[0]);
  }, 128);

<div id="rec"></div>
<div id="label">REC</div>

#rec {
  float: left;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: red;
}

#label {
  font-weight: bold;
  font-family: Arial;
  margin-left: 22px;
}