code: @Schedule(period = 10, waitFor = 5)
      @POST
      @Path("delaySchedule")
      public Broadcastable delaySchedule(@FormParam("message") String message) {
          return broadcast(message);
      }
docs: Wait 5 seconds and then execute periodic {@link Broadcaster#broadcast(java.lang.Object)}
  operations.
  
  @param message A String from an HTML form
  @return A {@link Broadcastable} used to broadcast events.