It depends. The site I use is: gifmaker.me/ And MS Paint Just take this icon base, edit it however, copy it (In this case, 6 times), slice one part of the base (In this case, box 1) out so it's in a 50x50 square. Move the 50x50 square up to the top left corner of the screen (Without making the square smaller than 50x50). Now shrink the image down to the edges of the 50x50 box. Repeat until all 7 boxes are cut out. Next, go to the GIF maker mentioned above and select "Upload images", uploading all 7 in order. Change the speed until it looks how you want it to, then hit the "Create GIF" button. 3 Options will pop up. Hit "View the GIF animation". Right-click the GIF and then hit the "Save picture as..." That's about it. If you need any more help, drop me a comment!
all you do, is open up MS paint.Color in each square,add hair, clothes, ears, whatever. now select one square, copy it, then open up 7 (or the number of any other base squares, like say 9 for example) ms paint canvases. Paste the square into the ms paint canvas, then make the canvas strech into the square and make it just that square.save it. repeat however many times iyou have to. when you're done, you can go to Ezimba.com then click "add image". add your FIRST square. then, click frame animation. put in all of your other squares and then select speed. click "convert", then open your gif in a new tab. Save it, then post it to deviantart with the sources. I hope I helped!!