anchor.diff:      pts.text = "Points: ${points}";
     }
   
  +
  +  List<Coord> getCoords() {
  +    return coords;
  +  }
   
     // Detect if we're outside the canvas.
     bool isOnCanvas(Coord coord) {
  
positive.code: 
  
  void newGame() {
    print("newGame triggered");
  
  
    CanvasElement element = querySelector(".game-element");
    gameLoop = new GameLoopHtml(element);
    canvas = element.context2D;
  
negative.code: 
      assert(coords.length >= oldLength);
    }
  
    void render(canvas) {
      coords.forEach((c) => renderSquare(c, white_color));
  