I use the "Photoscape" for the GIF animator. It is free. http://www.photoscape.org/ps/main/index.php
You make a serials of images, open the program(photoscape>animated GIF), drop them in sequence, the animator will then combine them into one GIF file, together with your settings for the frame rate, effect, image size and so on. You can preview them in web browser, and saving.
The problem is you need take a time to make those pictures. And have fun.