This is a little script that randomly choose a wallpaper from a folder where WinLight was run.
WinLight download Windows 10 Spotlight Lock screen images.
mkdir -p ~/.local/bin/ ~/.local/share/systemd/user/cp change_wallpaper_winlight.sh ~/.local/bin/ && chmod +x ~/.local/bin/change_wallpaper_winlight.shcp change_wallpaper_winlight.{timer,service} ~/.local/share/systemd/user/- Edit
~/.local/bin/change_wallpaper_winlight.shand change IMAGE_DIR to the directory where you store images - Edit
~/.local/share/systemd/user/change_wallpaper_winlight.serviceand change ExecStart to the right path systemctl --user daemon-reload && systemctl --user enable change_wallpaper_winlight.timer && systemctl --user start change_wallpaper_winlight.timer