Macros to use :timer.apply_after and :timer.apply_interval with a block, e.g.:
iex(1)> import BlockTimer
nil
iex(2)> apply_after 3 |> seconds, do: IO.puts "hello"
{:ok, {1407446427626194, #Reference<0.0.0.371>}}
iex(3)> hello iex(1)> import BlockTimer
nil
iex(2)> {:ok, counter} = Agent.start_link fn -> 0 end
{:ok, #PID<0.70.0>}
iex(3)> {:ok, tref} = apply_interval 1 |> seconds do
...(3)> Agent.update(counter, fn(count) -> count + 1 end)
...(3)> IO.puts Agent.get(counter, fn(count) -> count end)
...(3)> end
{:ok, {:interval, #Reference<0.0.0.382>}}
iex(4)> 1
2
3
4
5
:timer.cancel tref
{:ok, :cancel}
iex(5)>