anchor.diff:      ok.
   
   %% ===================================================================
  -%% Interanl functions
  +%% Internal functions
   %% ===================================================================
   
   new_room_name() ->
  
positive.code: 
  relay_message(Msg, Room) ->
      [Pid ! <<Msg/binary>> || Pid <- pg2:get_members(Room) -- [self()]].
  
negative.code: 
  -record(state, {room=undefined}).
  
  -include_lib("eunit/include/eunit.hrl").
  
  %% ===================================================================
  %% Websocket API
  %% ===================================================================
  
  init({tcp, http}, _Req, _Opts) ->
      {upgrade, protocol, cowboy_websocket}.
  
  websocket_init(_TransportName, Req, _Opts) ->
  