anchor.diff:      canvas.strokeText("Inside snake pen", 0, 100);
   
       canvas.fillRect(0, 0, 20, 20);
  +    gold.render(canvas);
       snake.render(canvas);
     }
   
  
positive.code: import 'dart:html';
  import 'package:game_loop/game_loop_html.dart';
  
  GameLoopHtml gameLoop;
  
negative.code: 
    Coord direction = right;
  
    Gold gold;
  
    SnakeState(String n) {
      this.name = n;
      // XXX Should not be necessary (and is a bogus coupling in any case)
      this.snake = new Snake(canvas);
      this.gold = new Gold(this.snake);
      this.speed = 10;
    }
  
  