fomantic-ui/test/fixtures/shape.html

Fomantic empowers designers and developers by creating a shared vocabulary for UI.

<div class="ui shape">
  <div class="sides">
    <div class="active side">This side is visible.</div>
    <div class="side">This side is not visible.</div>
    <div class="side">This side is not visible.</div>
  </div>
</div>