title: Triggering an event every second
body: <p>I have an application that needs to check a website feed every second.</p>
  
  <p>Sometimes the request to the server is longer than a second. In this case, the application needs to wait until the first request completes, then start a new request immediately. How could I implement this?</p>
  
  <p>Also, the request should not freeze the GUI.</p>