Windows 10 lock screen slideshow timer settings

I would like to set up a Windows 10 lock screen slideshow with variable timings but cannot do so. I can only set one picture as a lock screen background but thought it should be possible to set up a slideshow of assorted images with say a 1 minute delay between each picture. Can anyone confirm if this is possible? When I look under Lock Screen settings  I can't see anywhere to change timer settings and I think there is something missing.All advice gratefully received.