1.Check the Internet for one.
2.Open in Adobe Photoshop,Re-proportionate the image(i.e., make length equal to breadth),and modify pixel dimensions.
(you may need to convert the image into .jpg)
By the way, Animated Avatars are not allowed in this board.
Life is but a River.
A continuous flow,relentless till it reaches its destination.
Rocks,rapids,falls hinder not the flow of the strong.
It has its ups,and its downs.
And in the end,peacefully.......
It dissipates into to vast Ocean.