How do I customize my Wallpaper? [For a Sansa Fuze]

I just got my Sansa [Fuze] last Sunday and I really like it, but I haven’t been able to customize my wallpaper.  Can you download different wallpapers yourself, or do you have to go to a special website?

[I only have one color and its blue] 

Have you updated to the latest firmware (01.01.15) released a couple of weeks ago? You should have 6 different colors. They are under SETTINGS > SYSTEM SETTINGS > WALLPAPER (top listing). They’re all solid colors; not very interesting. Unfortunately, there’s no way to customize them yourself until such time when the folks at Rockbox crack the code. Sandisk may do something in a future update, but I doubt it.