title: React Motion: simple chaining
body: <p>I'm using react, mobx and I need to animate things.</p>
  
  <p>I want to do a simple animation chaining: when the first animation ends, the second starts.</p>
  
  <p>As use case think of a section templates: every time the user change the section, the current section fade out and then the next section fade in.</p>
  
  <p>Any hints?</p>