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<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <title>Simple Opacity Animation</title>
  </head>
  <body>
    <h1>Simple Opacity Animation</h1>
    <div
      class="animated-element"
      style="width: 100px; height: 100px; background-color: blue"
    ></div>
    <button style="margin-top: 15px" onclick="startAnimation()">
      Start Animation
    </button>
    <p id="message"></p>
    <script>
      let animation;

// Create and play the animation
        animation = element.animate(keyframes, options);

// Handle animation events
        animation.onfinish = () => {
          document.getElementById("message").textContent =
            "Animation finished!";
        };

animation.oncancel = () => {
          document.getElementById("message").textContent = "Animation reset.";
        };
      }

// Resets the animation
      function resetAnimation() {
        if (animation) {
          animation.cancel();
        }
        startAnimation(); // Restart the animation
      }
    </script>
  </body>
</html>