This app was mentioned in 7 comments, with an average of 1.29 upvotes
I use Animated Photo Widget (https://play.google.com/store/apps/details?id=com.hikaru.photowidgetad) I really like it and it has a cool polaroid frame.
Probably something like this will do the same thing for the widget.
https://play.google.com/store/apps/details?id=com.hikaru.photowidgetad
I'm sure there is an app to make custom icons too