title: Input cursor that is blinking
body: <p>i am having trouble with making the input cursor to blink. How do you make an animation that the cursor "|" inside the input field (placeholder) keeps blinking. 
  The code that i have is this: </p>
  
  <pre><code>&lt;input type="text" class="rq-form-element" placeholder="|"/&gt;
  </code></pre>
  
  <p>I have no idea on how to get this even started. Any suggestions?</p>