I have a few options for you if you DON'T have a gif icon:
• Go on the Fanpop Search Bar and look up "animations" a spot will come up with icons in GIF form. There will be a section with icons.
But if you can't find what you like there,
• Go on Google Images and search (WHAT YOU WANT) gif icon and the icon you may like will come up.
Then you save that icon (which ever you chose) and upload it to your photo gallery and put it as your icon.