wtf.erl

handle_info(tick, State) ->
    Now = now(),
    Waiting = lists:map(fun ({GameId, WantedPlayers, Players}) ->
                {GameId, WantedPlayers,
                    lists:filter(fun ({_, _, _, Start, _}) ->
                                timer:now_diff(Now, Start) > 60000
                        end, Players)}
        end, State#state.waiting),
    NewWaiting = lists:filter(fun ({_, _, []}) -> false;
            (_) -> true
        end, Waiting),
    erlang:send_after(1000, self(), tick),
    {noreply, State#state{waiting = NewWaiting}};