tampermonkey yandex music autoplay

// ==UserScript==
// @name yandex music autoplay
// @namespace http://tampermonkey.net/
// @version 0.1
// @description try to take over the world!
// @author You
// @run-at  document-end
// @require http://code.jquery.com/jquery-1.12.4.min.js
// @match  *://music.yandex.ru/users/tohadev/*
// @grant none
// ==/UserScript==
console.log("START");

var iter = 0;
function sleep(milliseconds) {
    var start = new Date().getTime();
    for (var i = 0; i < 1e7; i++) {
        if ((new Date().getTime() - start) > milliseconds){
            break;
        }
    }
}
function wtf()
{
    console.log("H WTF");

    console.log("iter:"+iter);
    iter++;
    if (iter == 5)
    {
        //document.getElementsByClassName("icon icon_next icon_size_XL")[0].click();
        //document.querySelector('.player-controls__btn_next').click();
        externalAPI.next();
        /*var musicID = Math.floor(Math.random() * (20 - 0) + 0);
        console.log('page loaded mid:'+musicID);
        document.getElementsByClassName("icon icon_pp icon_size_L")[musicID].click();*/
    }
    else
        setTimeout(wtf, 1000);
}

function onload_ev()
{
    console.log("H EV LOADED");
    /*var musicID = Math.floor(Math.random() * (20 - 0) + 0);
console.log('page loaded mid:'+musicID);
sleep(120000);
document.getElementsByClassName("icon icon_pp icon_size_L")[musicID].click(); */
    setTimeout(wtf(), 5000); //setTimeout isnt working
}

window.onload = onload_ev;