title: Representing loops in a UML activity diagram
body: <p>I am trying to design an activity diagram (UML) for a networked tic tac toe game that I developed, with sockets. I am using activity partitions (swimlanes). So, there is three partitions: Client1, Server, and Client2.</p>
  
  <p>The diagram is looking good, except I do not know how to represent loop structures. </p>
  
  <p>If you look at this link: <a href="http://www.sparxsystems.com/resources/uml2_tutorial/uml2_activitydiagram.html" rel="noreferrer">activity diagram</a>, and look at the last diagram on the page (Partition), that is the type of activity diagram that I am working with. </p>
  
  <p>Does anyone know how I can represent loops? Thanks!</p>