Automatically change welcome/lock screen background image at each boot

I am aware of the guide to change the lock screen background image, in fact I have a customized image.
But is there a way to cycle through a folder images and change the lock screen image automatically?
Perhaps using a batch file at every startup so it simply picks the next image in the folder?
But how to do this from cmd? Or maybe there is an app ?

Let's see how that works, because my lock screen is disabled actually, so I would only see any change after I reboot.

I have tried that solution but it doesn't work, at every boot I have the same background. My lock screen is disabled so that might have something to do with it. Any other solution?