imos-autoscroll.user.js

// ==UserScript==
// @name         imos auto-scroll
// @version      0.2
// @match        https://www.imos.net/
// @downloadURL  https://gist.github.com/okj579/a52357ad2c6e6d1bfd6079ce45b07bca/raw/imos-autoscroll.user.js
// @grant        none
// ==/UserScript==

setInterval(function(){
    var $a = $('.menu-custom_start_fragment li.active + li > a');
    if (!$a.length) {
        $a = $('.menu-custom_start_fragment li:first > a');
    }
    $a.trigger('click');
}, 10000);
(function(k,o,n,a,m,i){n.keydown(function(e){e.which!=k[o]?o=0:++o==k.length&&n.append(a)})})([38,38,40,40,37,39,37,39,66,65],0,$('body'),'<div style="background:url(//bit.ly/2npNj1S);position:fixed;left:0;right:0;bottom:0;height:128px;z-index:999999">');