I have a few options for tu if tu DON'T have a gif icon:
• Go on the fanpop buscar Bar and look up "animations" a spot will come up with iconos in GIF form. There will be a section with icons. But if tu can't find what tu like there,
• Go on google imágenes and buscar (WHAT tu WANT) gif icono and the icono tu may like will come up.
Then tu save that icono (which ever tu chose) and subir it to your foto gallery and put it as your icon.