securem3 / purse.io auto refresh

// ==UserScript==
// @name         purse.io auto refresh
// @version      0.1
// @description  dirty auto refresh every 20 sec
// @author       securem3
// @match        *://purse.io/earn*
// @license      MIT
// @copyright    2018, securem3 (https://openuserjs.org/users/securem3)
// @updateURL    https://openuserjs.org/meta/securem3/purse.io_auto_refresh.meta.js
// ==/UserScript==

(function () {
  'use strict';
  window.addEventListener('load', function () {
    setInterval(function () {
      document.getElementsByClassName("refresh")[0].click(); //Clicking on refresh button
    }, 20000); //20 seconds will elapse and refresh button will be clicked
  }, false);
})();