Start animation on scroll

I created an animation in adobe animate cc. The animation starts on page load, but I'd like to have it start when the content comes into the viewport. Any ideas on how to achieve this?

Is there an option in animate for this to automatically spit the correct script out? Or do I have to edit the script manually? Any ideas on how I would edit the script?

I am not using muse or any other programs. Using my own files.

Any help would be great. Thank you.