   """
   @spec timer(non_neg_integer) :: Enumerable.t
   def timer(n) do
-    Stream.take(interval(n), 1)
+    take(interval(n), 1)
   end
 
   @doc """

  end

  @doc """
  Creates a stream that emits a single value after `n` milliseconds. The value emitted is
  `0`.
  
  ## Examples


  end

  @doc """
  Creates a stream that emits a value every `n` milliseconds.

  The values emitted are an increasing counter starting at `0`.

  ## Examples

