Automatically start photos slideshow when locking iPad

Hi,

We have a bunch of corporate iPads which are used in a marketing/client setting. They may be sitting around often unused in a corner.

So rather than sit with a blank dark page, what would be really useful is that whenever the iPad goes into auto-lock mode after a few minutes then the photo viewer starts automatically to shuffle through some marketing photos. Just like what can be activated manually at the lock screen.

Does anyone know if this is doable?

Thanks