New Twiddle

controllers.application.js

import Ember from 'ember';

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

styles.app.css

body {
  margin: 0;
  font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 12pt;
}

.ember-application > div {
	height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.container-a {
  flex: 1 0 auto;
  position: relative;
  width: 20%;
}

.spinner {
  height: 50px;
}

.container-b {
  text-align: center;
  flex: 1 0 auto;
  width: 100%;
}

templates.application.hbs

<div class="container-a">

</div>
<div class="spinner">
<svg class="lds-spinner" width="100%" height="100%" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" viewBox="0 0 100 100" preserveAspectRatio="xMidYMid"><g transform="rotate(0 50 50)">
  <rect x="47" y="24" rx="9.4" ry="4.8" width="6" height="12" fill="#337ab7">
    <animate attributeName="opacity" values="1;0" times="0;1" dur="1s" begin="-0.9166666666666666s" repeatCount="indefinite"></animate>
  </rect>
</g><g transform="rotate(30 50 50)">
  <rect x="47" y="24" rx="9.4" ry="4.8" width="6" height="12" fill="#337ab7">
    <animate attributeName="opacity" values="1;0" times="0;1" dur="1s" begin="-0.8333333333333334s" repeatCount="indefinite"></animate>
  </rect>
</g><g transform="rotate(60 50 50)">
  <rect x="47" y="24" rx="9.4" ry="4.8" width="6" height="12" fill="#337ab7">
    <animate attributeName="opacity" values="1;0" times="0;1" dur="1s" begin="-0.75s" repeatCount="indefinite"></animate>
  </rect>
</g><g transform="rotate(90 50 50)">
  <rect x="47" y="24" rx="9.4" ry="4.8" width="6" height="12" fill="#337ab7">
    <animate attributeName="opacity" values="1;0" times="0;1" dur="1s" begin="-0.6666666666666666s" repeatCount="indefinite"></animate>
  </rect>
</g><g transform="rotate(120 50 50)">
  <rect x="47" y="24" rx="9.4" ry="4.8" width="6" height="12" fill="#337ab7">
    <animate attributeName="opacity" values="1;0" times="0;1" dur="1s" begin="-0.5833333333333334s" repeatCount="indefinite"></animate>
  </rect>
</g><g transform="rotate(150 50 50)">
  <rect x="47" y="24" rx="9.4" ry="4.8" width="6" height="12" fill="#337ab7">
    <animate attributeName="opacity" values="1;0" times="0;1" dur="1s" begin="-0.5s" repeatCount="indefinite"></animate>
  </rect>
</g><g transform="rotate(180 50 50)">
  <rect x="47" y="24" rx="9.4" ry="4.8" width="6" height="12" fill="#337ab7">
    <animate attributeName="opacity" values="1;0" times="0;1" dur="1s" begin="-0.4166666666666667s" repeatCount="indefinite"></animate>
  </rect>
</g><g transform="rotate(210 50 50)">
  <rect x="47" y="24" rx="9.4" ry="4.8" width="6" height="12" fill="#337ab7">
    <animate attributeName="opacity" values="1;0" times="0;1" dur="1s" begin="-0.3333333333333333s" repeatCount="indefinite"></animate>
  </rect>
</g><g transform="rotate(240 50 50)">
  <rect x="47" y="24" rx="9.4" ry="4.8" width="6" height="12" fill="#337ab7">
    <animate attributeName="opacity" values="1;0" times="0;1" dur="1s" begin="-0.25s" repeatCount="indefinite"></animate>
  </rect>
</g><g transform="rotate(270 50 50)">
  <rect x="47" y="24" rx="9.4" ry="4.8" width="6" height="12" fill="#337ab7">
    <animate attributeName="opacity" values="1;0" times="0;1" dur="1s" begin="-0.16666666666666666s" repeatCount="indefinite"></animate>
  </rect>
</g><g transform="rotate(300 50 50)">
  <rect x="47" y="24" rx="9.4" ry="4.8" width="6" height="12" fill="#337ab7">
    <animate attributeName="opacity" values="1;0" times="0;1" dur="1s" begin="-0.08333333333333333s" repeatCount="indefinite"></animate>
  </rect>
</g><g transform="rotate(330 50 50)">
  <rect x="47" y="24" rx="9.4" ry="4.8" width="6" height="12" fill="#337ab7">
    <animate attributeName="opacity" values="1;0" times="0;1" dur="1s" begin="0s" repeatCount="indefinite"></animate>
  </rect>
</g></svg>
</div>
<div class="container-b">
	<span>These are my insights</span>
</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"
  }
}