Roblox Card Generator 2.0

/*
- ROBLOX Card Code Generator 2.0
- Code by cdskl;
- Instructions by ChocolatBunny.
= Use:
= Launch a browser with a JavaScript console, like Chrome
= Go in https://roblox.com/redeem
= Then open the console
= Do CTRL+A in this file
= Then do CTRL+S
= Go to the console and do CTRL+V
= Start the code
= Then follow the instruction in the dialogue boxes
= WARNING: DO NOT DISABLE DIALOGUE BOXES.
- I think you're ready.
*/
alert("Bot by cdskl, and edited by ChocolatBunny");
alert("/!\ Warning! /!\ This bot can create lag to your PC and your connection!");
alert("For stop the bot, refresh the page!");
alert("Choose a speed;");
alert("1 - 100= Fastest; 100 - 500= Fast; 500 - 1000= Slow; 1000+ = Slowest");
var speed = prompt("Enter a speed")
var nums = [6, 7]

function main() {
    var key = ((nums[Math.floor(Math.random() * nums.length)].toString()) + (Math.floor((Math.random() * 10)).toString()) + (Math.floor((Math.random() * 10)).toString()));
    var key2 = ((Math.floor((Math.random() * 10)).toString()) + (Math.floor((Math.random() * 10)).toString()) + (Math.floor((Math.random() * 10)).toString()));
    var key3 = ((Math.floor((Math.random() * 10)).toString()) + (Math.floor((Math.random() * 10)).toString()) + (Math.floor((Math.random() * 10)).toString()) + (Math.floor((Math.random() * 10)).toString()));
    var code = (key + " " + key2 + " " + key3)
    document.getElementById("pin").value = code;
    Roblox.GameCard.redeemCode();
}

setInterval(function() {
    main();
}, speed);
/*  Search ChocolatBunny in Roblox (:  */