How do you make your myspace default picture change to various pictures? what generator do i use?

http://gifninja.com

http://www.lunapic.com/editor/

http://www.good-tutorials.com

http://www.blibs.com/animation-factory/

http://nbswebfx.com/

http://www.gifworks.com/How do you make your myspace default picture change to various pictures? what generator do i use?
http://www.gifninja.com/CreateAGif.aspx