Dark Hole

var elem = document.querySelector('input[type="range"]');

var rangeValue = function(){
  var newValue = +elem.value;
  var target = document.querySelector('.value');
  if(newValue > 80 && newValue < 100) target.innerHTML = '1';
  else if(newValue > 100 && newValue < 120) target.innerHTML = '123';
  else target.innerHTML = '';
}

elem.addEventListener("input", rangeValue);

function get_style() {
  function f() {
    if(i >= bestValues.length) return;
    bestValues[i].style.color = "green";
    ++i;
    setTimeout(f, 1000);
  }
  var i = 0;
  f();
}

function get_style() {
  for (i = 0; i < bestValues.length; i++) {
    (function(i) {
      setTimeout(function() { bestValues[i].style.color = "green"; }, 1000 * i);
    }(i));
  }
}

var id = 0;
el.on('click', function(e) {
  if(e.detail == 0) id = setInterval(function() {
    ...
  }, 500);
  else clearInterval(id);
});