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# Recipe: Evaluate a Task Periodically

In the above section where we needed to generate an auth token every so often, we used:

```scala
val authStream: Stream[Task, AuthToken] = time.awakeEvery[Task](60.minutes).
  evalMap { _ => Task.delay(AuthToken((math.random * 1000).toInt)) }
```

You can also do something like:

```scala
(eval(authCreationTask).repeat zip time.awakeEvery(1.minute)).map(_._1)
```

which essentially does the same thing. You'll need a Scheduler and Strategy (or an Async) in implicit scope.