protected function enterFrameHandler(event:Event):void {
                for each( var roomVar:RoomVariable in room.roomVariables ){
                    var letterData:EsObject = roomVar.value;
                    trace('letterData: ' + letterData );
                    var letter:Sprite = getChildByName( "letter-" + letterData.getInteger( "letter" )) as Sprite;
                    trace('letter: ' + letter);
                    letterData.setInteger("x", letter.x );
                    letterData.setInteger("y", letter.y );

                    var req:UpdateRoomVariableRequest = new UpdateRoomVariableRequest();
                    req.zoneId = room.zoneId;
                    req.roomId = room.id;
                    req.name = roomVar.name;
                    req.value = letterData;
                    req.valueChanged = true;
                    es.engine.send( req );
                }
            }