function animate(timing, draw, duration) {
  return new Promise((resolve) => {
    const start = performance.now();
    requestAnimationFrame(function _animate(time) {
      let timeFraction = (time - start) / duration;
      if (timeFraction > 1) timeFraction = 1;

      const progress = timing ? timing(timeFraction) : timeFraction;
      draw(progress);

      if (timeFraction < 1) {
        requestAnimationFrame(_animate);
      } else {
        resolve();
      }
    });
  });
}