 <a href="https://codepen.io/martinlaxenaire/post/webgl-enhanced-drag-slider-tutorial-with-curtains-js-part-2" target="_blank" title="WebGL drag slider complete step-by-step tutorial on CodePen, part 2: adding the WebGL">part 2: adding the WebGL</a>, <a href="https://codepen.io/martinlaxenaire/post/webgl-enhanced-drag-slider-tutorial-with-curtains-js-part-3" target="_blank" title="WebGL drag slider complete step-by-step tutorial on CodePen, part 3: improving performance">part 3: improving performance</a>
  