anchor.diff:    }
   
     onRender(GameLoopHtml gameLoop) {
  -    canvas.clearRect(0, 0, snakePenSizeInPixels.getX(), snakePenSizeInPixels.getY());
  +    canvas.clearRect(0, 0, snakePenSizeInPixels.getX(),
  +        snakePenSizeInPixels.getY());
       canvas.fillStyle = "rgb(255,165,0)";
  -    canvas.fillRect(0, 0, snakePenSizeInPixels.getX(), snakePenSizeInPixels.getY());
  +    canvas.fillRect(0, 0, snakePenSizeInPixels.getX(),
  +        snakePenSizeInPixels.getY());
       canvas.font = "italic bold 24px sans-serif";
       canvas.strokeText("Inside snake pen", 0, 100);
   
  
positive.code:   }
  }
  
  
  class SnakeState extends GameLoopHtmlState {
  
    CanvasRenderingContext2D canvas;
  
  
negative.code:   String white_color = "#FFFFFF";
  
    void renderGridBlock(final Coord c, final String color) {
      canvas.fillStyle = color;
      canvas.fillRect(gridBlockSizeInPixels.getX() * c.getX(),
          gridBlockSizeInPixels.getY() * c.getY(), gridBlockSizeInPixels.getX(),
          gridBlockSizeInPixels.getY());
    }
  
    String name;
  