Sure, here's an example of an HTML file that creates a dancing skeleton animation using ASCII characters:
Dancing Skeleton Animation
To use this code, simply save it in an HTML file (e.g., `index.html`) and open it in a web browser on your smartphone. You will see a dancing skeleton animation displayed using ASCII characters. The animation will start automatically and loop through the frames defined in the `frames` array. You can adjust the speed of the animation by changing the interval value passed to `setInterval` (in milliseconds).