How can i generate child model in mongoose

I'm trying to model the following.

I have a parent model that is called Brick that has some attributes. There will be 5+ type of bricks that will all have their own specific attributes wich are needed also.

I want to be able to select all Bricks of a certain custumer id later, whatever the type (TwitterBrick, facebookBrick et cetera) is.

var mongoose = require('mongoose');
var Schema = mongoose.Schema;

// set up a mongoose model
module.exports = mongoose.model('Brick', new Schema({ 
    type: String, 
    userid: { type: String, required: true},
    animationspeed: { type: Number, min: 1, max: 100 }, 
    socialsite: String,     // none, twitter, instagram
    socialsearchtags: String,
    tagline: { type: String, minlength:3,maxlength: 25 },

}));

An example for a child is TwitterBrick. for now it is:

var mongoose = require('mongoose');
var Schema = mongoose.Schema;
module.exports = mongoose.model('TwitterBrick', new Schema({ 
    bgColor1: String, 
    bgColor2: String,
    bannerBgColor1: String,
    bannerBgColor2: String,
}));

TwitterBrick should inherit the attributes of Brick , but i don't know how.. Can you help me in the right direction?

Thanks! Steven

via socialb