Automatic Slideshow in Keynote?

I am working on a speech presentation for an online class. The problem I had was, I couldn't record the slideshow with me speaking the entire 5 minutes because that was too difficult to not make any mistakes. SO, I recorded voice memos on my phone for each slide and put them into the slide. When you go to the slide, they automatically start playing. Great. But what if I want it to move to the next slide right after the audio is done playing?? How do I make the presentation "Automatic"? Please help! This is due today! Thanks!!