Loop Button animation in a HTML5 Canvas banner

Hi!

I'm building a banner ad in Animate on a HTML5 Canvas.

All my assets are imported PNGs and I have a movie clip at the end with a pulsating button.

I want the ad to play once and then have a loop on the pulsating button ( so the button keeps pulsating).

In my mind I could add a script at the end to jump to the frame the animation of the button starts.

Would that work? What code snipped could I use?

Final banner should be HTML5

Thanks, A