Oh. yeah. right. x)
Thanks a lot ^^'

//main.js:
var queue = require('spawn.queue');

module.exports.loop = function ()
{
    queue.addCreep('Hello World !', 2);
    console.log(queue.checkCreep);
};

//queue.js:
var spawnQueue = [];

module.exports =
{
    addCreep: function(creep, number)
    {
        for (;number > 0; number++)
        {
            spawnQueue.push(creep);
        }
    },
    
    spawnCreep: function(creep, number)
    {
        for (;number > 0; number++)
        {
            spawnQueue.unshift(creep);
        }
    },
    
    checkCreep: function()
    {
        return (spawnQueue[0]);
    },
    
    getCreep: function()
    {
        return (spawnQueue.shift());
    }
};

So. In simulation, this is making the game crash. idk where to start. x)

Can someone pls help me ? ^^