anchor.diff:    }
   
     // replacement method for Star.prototype.draw in JS version
  -  void _drawSceneStar(Star star) {
  +  void _drawStar(Star star) {
       _mvPushMatrix();
   
       // Move to the star's position
  
positive.code: 
      // Draw the star in its main color
      _gl.uniform3f(_uColor, star.r, star.g, star.b);
      _drawStar();
  
      _mvPopMatrix();
    }
  
    void _drawStar() {
      _gl.activeTexture(webgl.RenderingContext.TEXTURE0);
      _gl.bindTexture(webgl.RenderingContext.TEXTURE_2D, _texture);
      _gl.uniform1i(_uSampler, 0);
  
negative.code: 
      // transform/draw each star
      for (Star s in _stars) {
        _drawStar(s);
        _spin += 0.1;
      }
  
  