lame.model.js

var model = {
  observers: new Array(),
  position: null,
  text: null,
  queue: null,
  running: false,
  start: function() {
    if (this.running) return;
    this.running = true;
    this.queue = [
      {p: {x:300,y:200}, t: 'ゆっくり'},
      {p: {x:50,y:120}, t: 'して'},
      {p: {x:500,y:40}, t: 'いってね！'},
      {p: {x:0,y:0}, t: ''}
    ];
    this.next();
  },
  stop: function() {
    this.position = null;
    this.text = null;
    this.queue = null;
    this.running = false;
  },
  next: function() {
    if (!this.running) return;
    if (this.queue.length == 0) {
      this.stop();
      return;
    }
    item = this.queue.shift();
    this.position = item.p;
    this.text = item.t;
    this.notify();
  },
  notify: function() {
    for(var i = 0; i < this.observers.length; i++) {
      this.observers[i].update();
    }
  }
};