title: can't find a design pattern for my structure
body: <p>I need the following workflow:</p>
  
  <ol>
  <li>A request comes</li>
  <li>It is being processed</li>
  <li>if procession result is false, wait for 10 sec</li>
  <li>If procession result is true or 10 sec has passed, go to 2.</li>
  </ol>
  
  <p>What the design pattern here?</p>