-module(m).
-export([a/1,diff/0]).

version() ->
    2.

diff() ->
    "Increments the version, changes B assigned atom to 'second'".

a(P) ->
    io:format("Started a() from version ~p ~n", [version()]),
    B = second, 
    C = fun() -> io:format("From closure, version() -> ~p, B -> ~p ~n", [version(), B]) end,
    C(),
    P ! closure_executed,
    receive 
        continue -> C()
    end,
    P ! closure_executed.