How can I create simple loop for 20 seconds?

I am new to Voiceflow and I am building a Dog Sounds alexa skill.

For a start, I have 9 dog barking sounds which are played randomly. Now I am trying to make a simple loop to play sounds for about 20 seconds.

How can I achieve this functionality?

Thank you in advance,

alexa cannot contain more than 5 audio files in one single response. so looping should be up to 5. I’m not sure about your audio files’ length and you may need to create longer audio files.