Application Name: Wallpaper Changer 2.0 Headless
The smallest and coolest wallpaper changer ever. Only 81K and completely headless. Requires OS10.2 and higher
Completely rewritten for OS10.2 to support Headless Mode. See the new screen shots.
Wallpaper Changer is a native BlackBerry® 10 application to automate wallpaper changing on the HomeScreen.
You select the timer from 1min to 8hours, Daily, Weekdays or Weekly to change wall papers. Select the folder where you keep all your pictures.
Select how to rotate wall papers randomly or sequentially ( in sequence order). Simple as that.
You can even optionally set a password screen lock wallpaper.
Link: Wallpaper Changer - BlackBerry World