auto fig = figure();
  auto ax = fig->axis();
  const int n = 100;
  const int nframes = 10;
  std::vector<float> x(n);
  std::vector<float> y(n);

  // define x points
  for (int i = 0; i < n; ++i) {
    x[i] = static_cast<float>(i) / n;
  }

  // define y = sin(x) with given amplitude and frequency
  auto get_ysinx = [&](const float amplitude, const float freq) {
    for (int i = 0; i < n; ++i) {
      y[i] = amplitude * std::sin(6.28f * freq * x[i]);
    }
    return create_data().x(x).y(y);
  };

  // create a static sin(x) function
  auto static_plot = ax->line(get_ysinx(1.f, 2.f));
  static_plot->set_label("static");

  // create a moving sin(x) function with varying amplitude
  auto moving_plot = ax->line(get_ysinx(1.f, 5.f));
  moving_plot->set_label("moving");

  for (int i = 1; i <= nframes; ++i) {
    const float nf = static_cast<float>(nframes);
    const float amplitude = 1.f - 0.5f * std::sin(6.28f * i / nf);
    moving_plot->add_frame(get_ysinx(amplitude, 5.f), 3.f * i / nf);
  }

  // set label axes
  ax->xlabel("x");
  ax->ylabel("y");
  ax->title("the svg test");
  ax->legend();

  // output to svg
  std::ofstream out;
  out.open("readme.svg");
  BackendSVG backend(out);
  fig->draw(backend);
  out.close();