<h1>JavaScript animation with setInterval()</h1>
  <label>Choose de "frame rate" from the list:</label>
  <select id="frameRate">
    <option value="5">5 fps</option>
    <option value="15">15 fps</option>
    <option value="24" selected>24 fps</option>
    <option value="40">40 fps</option>
    <option value="60">60 fps</option>

  <label>Choose the distance covered in every frame:</label>
  <select id="distance">
    <option value="1">1px</option>
    <option value="5" selected>5px</option>
    <option value="10">10px</option>
    <option value="25">25px</option>
    <option value="50">50px</option>

<div id="box"></div>
#box {
  width: 50px;
  height: 50px;
  border: 1px solid #000;
  background-color: darkorange;
var box = document.querySelector("#box");
var frameRate = document.querySelector("#frameRate");
var distance = document.querySelector("#distance");
var int;

function animate() {
  var margin = 0;
  int = setInterval(function() {
      margin = (margin > window.innerWidth ? 0 : margin + Number(distance.value));
      box.style.marginLeft = margin + "px";
    1000 / Number(frameRate.value))


function reset() {

frameRate.addEventListener("change", reset);
distance.addEvenetListener("change", reset);

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External JavaScript

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