adam's order in coffeescript?

cofee.coffee

class Modifier
  constructor: (@name, @amount) ->

class Item
  constructor: (@item_name) ->
  
  addModifier: (modifier) ->
    @modifiers.push(modifier)

class Order
  constructor: (@name) ->
  
  addItem: (item) ->
    @items.push(item)  

adams_order = new Order "Adam Thurlow"

adams_coffee = new Item "Coffee"

adams_coffee.addModifier new Modifier("cream", 1)
adams_coffee.addModifier new Modifier("sugar", 1)

adams_order.addItem adams_coffee