There are several tutorials in the wild that lets you set random wallpapers with Tasker. But most of the tutorials have a common drawback: you need to name the wallpaper files in a certain fashion (mostly with numbers). But this is a daunting task if you have a large collection of wallpapers. So I have devised a simple way for Tasker to cycle through available wallpapers and choose a random one. Here’s how you can ask Tasker to set random wallpapers.
Every time you unlock your screen, you’d find a new wallpaper.
Looking for mobile wallpapers? Check out /r/iWallpaper