Clock.scala

class Clock extends CometActor {
 override def defaultPrefix = Full("clk")
 // schedule a ping every 10 seconds so we redraw
 ActorPing.schedule(this, Tick, 10 seconds)

 def render = csssel
 def csssel = "#time *" #> timeNow.toString
 
 override def lowPriority = {
   case Tick =>
     partialUpdate(SetHtml("theclock", csssel.apply(defaultHtml)))
   ActorPing.schedule(this, Tick, 10 seconds) 
 } 
}

View.html

<span id="theclock" lift="comet?type=Clock">
  <span id="time"></span>
</span>