Ascule and Que Feuilles, heroines of the anime TV series "Kiddy Grade 2" (or simply, "K-G.2"). Behind them, you see their mecha and ship.
In making this wallpaper in pain program, I used line tool to create a cross at centerpoint, thus separating the background into 4 areas. I then placed an image cropped out from a "Kiddy Grade" scan I found at animepaper onto the centerpoint. Last step was to color the areas of the background with the fill-with-color tool, using colors that match up with the hairs and dresses of the new "Kiddy Grade" heroines.
For all "Kiddy grade" fans to enjoy, although this anime isn't yet officially licensed for North American release.