anchor.diff:        numMessages = 0,
         turtlecanvas = $('#turtlecanvas'),
         prompt = $('#prompt'),
  -      commands = ['input', 'write', 'turtle', 'turtlebatch', 'exit', 'timeout', 'status'],
  +      commands = ['input', 'write', 'turtle', 'turtlebatch', 'render', 'exit', 'timeout', 'status'],
         streams = ['stdin', 'stdout', 'stderr'];
   
     var ENTER_KEY_CODE = 13;
  
positive.code:             showStatus(msg)
              break;
        }
    };
  
    var printWebsocketOutput = function(msg) {
  
negative.code:             showCanvas();
              handleTurtlebatchCommand(msg);
              break;
          case 'render':
            renderWebsocketOutput(msg);
            break;
          case 'exit':
              killWebsocketAndContainer();
              break;
  