Protruding Triangles is a semi-transparent .png image with triangles of varying opacities. To use, select Protruding Triangles as your wallpaper and set a background color with a dedicated background switcher (such as Nitrogen) or your file manager.

There are three versions: Protruding Triangles (4 aspect ratio), Protruding Trianges Wide (16:9 aspect ratio), Protruding Triangles Wide- HD (16:9 aspect ratio @2x).