New Twiddle

controllers.application.js

import Ember from 'ember';
let { computed, get, set } = Ember;
export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  value: '945',
  style: 'color: black',
  valor: computed('value', {
  	get(){
      let valor = `&#${get(this,'value')}` ;
      return valor.htmlSafe();}
}),
  actions:{
  	automatic() {
      set(this, 'style', 'color: red');
      
    	Ember.run.later(()=> {
        set(this, 'style', 'color: black');
        this.incrementProperty('value');
      }, 2000);
    }
  }
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br><div style={{style}}>{{valor}}</div>
<br>
{{outlet}}
<br>
<br>
{{input type='text' value=value}}
<br><br>
<button {{action 'automatic'}}>Automatic</button>

twiddle.json

{
  "version": "0.8.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.5.1",
    "ember-data": "2.5.2",
    "ember-template-compiler": "2.5.1"
  }
}