title: Animate fingerprint icon while authentication
body: <p>I implemented login screen with Fingerprint for my application. It works perfectly. Now I want to add some animations to fingerprint icon while user enrolling his/her finger or after authentication, like what android OS does.</p>
  
  <p>So far I found <a href="https://github.com/mattprecious/swirl" rel="nofollow noreferrer">swirl</a> library. It has some bugs so I preferred not using it.</p>
  
  <p>Any idea how to do this?</p>