Shaper is a small and free utility that changes wallpapers on your desktop on a regular interval.
You can make some settings for this software,such as change methods,change interval,wallpaper folder and so on.

Shaper v0.2.0 Features:
– Recursive search of a folder
– Image formats supported are BMP, PNG or JPEG
– Random/Sequential selection
– Option to automatically start with windows
– Notification icon to manually select next wallpaper
Shaper v0.2.0 changelog:
– Recursive folder search
– Resize large wallpapers to a suitable size
– Added ‘–notray’ argument to hide tray icon
License: freeware
Size: 207 KB
Requirements:Windows 7 / 10
The author’s web link:https://truehumandesign.se/s_shaper.php