An avatar when used as a favicon for the browser address bar and favorits list must have the filename extension .ico.
When you mentioned Flash I assumed that you wanted it to flash. An animated gif can flash but they have an extension .gif and I'm not sure it would work as an avatar, but you could try.
This is a very small program which can create an animated gif from two or more images the same size and you set the time delay between them; time delay ... cs means centiseconds where 50 is half a second, 100 is one second so set the delay you want.
http://www.whitsoftdev.com/unfreez/
It's much simpler than Flash.
For a static avatar you need an image program like Photoshop (which is not free) or Irfanview (free) or just Paint which is available on Windows computers. With Irfanview which I use you can place an image over another and build up a composite image, doing it as many times as you want. You then save it as .jpg or .gif or many other extensions.
Last edited by Wickham; 08 May 2009 at 01:16 AM.
Code downloaded to my PC will be deleted in due course.
WIN7; IE9, Firefox, Opera, Chrome and Safari for Windows; screen resolution usually 1366*768.
Also IE6 on W98 with 800*600 and IE8 on Vista 1440*900.