From skull model obtained in the model repository for Blender 3D, we have made a new wallpaper playing with the background color and lighting, reinforcing the contour lines with colors based on red, given special meaning in Halloween night.
You can install the image as wallpaper on your computer, to decorate at this time.

This year we bring a new wallpaper to decorate the background of your desktop, with one of the representative elements of the halloween party or “the deceased”:

A skull