<div ng-controller="SlideCountdownCtrl">
  <div ng-if="visible">
    <div class="countdown well" style="margin-top: calc({{index}}*100px);" ng-class="{ 'negative': seconds < 0 }">
      {{ seconds | osSecondsToTime}}
      <div class="description">{{ description }}</div>
    </div>
  </div>
</div>
