How do I make a flashing Image?

Question

I want to know how to make a flashing image like this one.

http://a41.ac-images.myspacecdn.com/images01/17/s_efb0fe06480d74e651098032d0326298.gif

Answer 1

you go to freecodesource.com and go to the generators and its on one of those pages and it gives u step by step

Answer 2

12.blibs.com

Answer 3

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/