fade in, fade out

// ==UserScript==
// @name         First Userscript
// @namespace    nikyreynolds.com
// @version      0.1
// @description  try to take over the world!
// @author       Niky
// @match        https://www.w3schools.com/*
// @grant        none
// @require http://code.jquery.com/jquery-latest.js
// ==/UserScript==

(function() {
<%%KEEPWHITESPACE%%>    'use strict';

<%%KEEPWHITESPACE%%>    // Your code here...

<%%KEEPWHITESPACE%%>    // hide, show, fadeIn, fadeOut, css
<%%KEEPWHITESPACE%%>    // class, ID, contains

<%%KEEPWHITESPACE%%>    var j = jQuery.noConflict();
<%%KEEPWHITESPACE%%>    j('a').css('border','1px solid red');
<%%KEEPWHITESPACE%%>    j('.w3-bar-item:contains("Learn")').hide();

<%%KEEPWHITESPACE%%>   setInterval (OnOff, 2000);

<%%KEEPWHITESPACE%%>    function OnOff() {
<%%KEEPWHITESPACE%%>    j('h1').fadeOut(1234);
<%%KEEPWHITESPACE%%>    j('h1').fadeIn(1564);
<%%KEEPWHITESPACE%%>    j('h2').fadeOut(4242);
<%%KEEPWHITESPACE%%>    j('h2').fadeIn(4242);
<%%KEEPWHITESPACE%%>    j('h3').fadeOut(3000);
<%%KEEPWHITESPACE%%>    j('h3').fadeIn(2000);
<%%KEEPWHITESPACE%%>    }

})();