New Twiddle

components.slideshow-container.js

import Ember from 'ember';

export default Ember.Component.extend({
});

components.slideshow-controls.js

import Ember from 'ember';

export default Ember.Component.extend({
});

components.slideshow-frames.js

import Ember from 'ember';

export default Ember.Component.extend({
});

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle'
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
{{#slideshow-container as |slideshow|}}
  {{slideshow.frames}}

  my custom stuff here

  {{slideshow.controls}}
{{/slideshow-container}}
<br>
<br>

templates.components.slideshow-container.hbs

{{yield (hash
  frames = (component "slideshow-frames")
  controls = (component "slideshow-controls")
)}}

templates.components.slideshow-controls.hbs

<button>Previous</button>
<button>Next</button>

templates.components.slideshow-frames.hbs

<div style="border:1px solid #000;width: 300px; height:300px">
A frame
</div>

twiddle.json

{
  "version": "0.12.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.12.0",
    "ember-template-compiler": "2.12.0",
    "ember-testing": "2.12.0"
  },
  "addons": {
    "ember-data": "2.12.1"
  }
}