Thanks. <3 I had a lot of trouble figuring out how to make it and I hate to use someone else's artwork that I can't credit back to like so many other pixel background signature on this site... and as for the sprites, well, everyone pretty well knows who made those, but I do credit that creator on my blog front. ^-^
I used MS Paint. =3 For pixeling, it's really the best program in my opinion.
As for making it transparent and outlining "Wishdrop" as well as "Tumblr" and "Cycle Tumblr", I used PS7 since it's quick and easy. However, I do have GIMP ((free program that also allows you to animate)) on my computer that can do the same thing quickly, but I couldn't remember where my shortcut for it was. XP