import scala.concurrent._
import scala.concurrent.duration._
import scala.concurrent.ExecutionContext.Implicits.global

// Experiment with and without the `blocking` call in this program!
object Test extends App {

  val x = Future.traverse(1 to 30){ i =>
    Future {
      println("Starting #" + i)
      blocking {
        Thread.sleep(2000)
      }
      println("Done with #" + i)
      i
    }
  }

  Await.ready(x, 1 minute)
}