I'm using a 3rd party utility to set very eye pleasing wallpapers on my 2013 MacBook Pro running macOS Mojave 10.14.2. Now I don't get to enjoy the beautiful sceneries in the background while I'm working but when I leave my desk, it would be really nice to leave the machine on (and locked) so that I can enjoy these gorgeous wallpapers.
Attached is an example of my locked screen with an amazing background. I would like to keep it like this as long as the computer is charging and the lid is not closed.
Note: I definitely do not want to the keep laptop running all the time especially with lid closed as I travel a lot for work.
How might I achieve this?