How to show layers when you click on player previous button?

I have created an app simulation for data entry, it all happens within the one slide with 20 layers. I want to be able to use the player buttons and when my user click previous is will show the previous layer.

if i'm on layer 9 and click previous, layer 8 will show. but if i'm on my base layer it will take me back to the previous slide.

Can this be done?

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