Feature request: iterate over the folder with different images

[iamkarlson]

It would be nice if instead of just one image, you would point swaylock to the directory with different images, which would be changed by timeout.

Perhaps, it would be a nice idea to store the last used so that it won't start iterating from the first one again, but rather from the last used and over.

[mstoeckl]

In case anyone needs this feature in particular, I maintain a fork (of the original swaylock) called swaylock-plugin, which can be made to rotate between wallpaper images; details are given in its README. It is fairly complicated pre-alpha quality code, and may crash and/or hang with the wrong plugin command or if you are unlucky. I don't expect it to be stable enough to try upstreaming the changes any time soon.