Live Wallpaper 038 Themes 4K Pro 14.6
If you can live with a "sort of" animated background, the best solution is Ubuntu's "slideshow" feature, which is a bit buried in Settings and only editable via slighly non-GUI means. It allows you to change your wallpaper, also in short intervals, thus giving you an animated impression.
Live Wallpaper 038 Themes 4K Pro 14.6
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