Diep Custom Background

// ==UserScript==
// @name         Diep Custom Background
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  Custom backgrounds for diep.io.
// @author       Adasba
// @match        http://diep.io
// @grant        none
// ==/UserScript==

(function() {
    'use strict';

    var img = document.createElement('img');
    img.src = "https://cdn.discordapp.com/attachments/358671241059762177/472473892259233796/b279af2.jpg";
    img.style = "z-index:-1;width:100%;height:100%;position:absolute;top:0px;left:0px";
    document.getElementsByTagName('body')[0].appendChild(img);



    var shaderButton = document.createElement('button');
    document.getElementsByTagName('body')[0].appendChild(shaderButton);
    var bg = true;
    shaderButton.style = "position:absolute; top:10px; left:10px;";
    shaderButton.innerHTML = "Toggle background";
    shaderButton.onclick = function() {
        bg = !bg;
        input.set_convar('ren_background', bg);
    }


    var shaderInput = document.createElement('input');
    document.getElementsByTagName('body')[0].appendChild(shaderInput);
    shaderInput.style = "position:absolute; top:30px; left:10px;";
    function loop1() {
        img.src = shaderInput.value;
    }
    setInterval(loop1, 1000);
})();