Multiplayer Piano auto change name code:Batery time

// ==UserScript==
// @name      18291change name
// @namespace  http://www.multiplayerpiano.com/
// @description  Modded Script For Multiplayerpiano.com
// @include http://www.multiplayerpiano.com/*
// @match http://www.multiplayerpiano.com/script.js
// ==/UserScript==

if (typeof(done) === "undefined") {
        var selfName = "Battery:"; // <-- your name here

        var done = true;
        var counter = 0;
        function updateName(name) {
                MPP.client.sendArray([
                {
                        m: "userset",
                        set:
                        {
                                name: name
                        }
                }])
        };
        var groceryList = ["|||||||||| 0%", "█|||||||| 10%", "██|||||||| 20%",
          "███||||||| 30%", "████|||||| 40%", "█████||||| 50%", "██████|||| 60%", "███████||| 70%", "████████|| 80%",  "█████████| 90%", "██████████ 100%", "Loaded","██████████ 100%","█████████| 90%","████████|| 80%","███████||| 70%","██████|||| 60%","█████||||| 50%","████|||||| 40%","███||||||| 30%","██|||||||| 20%","█|||||||| 10%","|||||||||| 0%","Low battery. 1 min to connect it"];

var foo = setInterval( function() {
                if (counter < groceryList.length - 1) {
                        counter++;
                        updateName(`${selfName} ${groceryList[counter]}`)
                } else {
                        counter = 0;
                        updateName(`${selfName} ${groceryList[counter]}`)
                }
        }, 60000);
MPP.chat.send("LGPvS's batery name changer: http://pastebin.com/3MaGPraa");
} else {
        console.info("==You already pasted this!==\nReload the page and paste again if you'd like to see any changes you made to the script.");
}