How to stop animation at specified time?

Question

HTML

good day!
in general, the problem is making a banner on adobe animate CC and it is necessary to stop at 30 seconds the
banner is looped works without stopping

Answer 1

Create a new layer at the root of the project.
Make a keyframe on the last frame.
Write there this.stop();

Answer 2

Find the 30th second in the timeline and stop.