Slideshow Control - how delay frame or jump to the correct one? (with atachment)

Hi!

I have a slideshow (as the one in the image), in wich I need to control trough 4 buttons: “back”, “pause”, “play”, and “forward”.

The problem is that I need a delay in each frame (and I do not know script for that) or, as it is in image, give 50 frames long for each image to appear.

How can I control with the “back” and “forward” buttons the slideshow, so that, when I click them, the animation jump to the respective frame?

If theres a simple way trough scripting, that permits me to keep 1 frame for each image, and introduce delay on it, please, I’m all ears.

Thanks for the time