方形图片转动并转换成圆形CSS特效

 <style>
     img { transition:all 0.8s ease 0s;}
     img:hover { border-radius:50%; transform:rotate(720deg);}
 </style>
 <img src="http://cdn.duitang.com/uploads/item/201312/05/20131205172330_8uCx4.thumb.700_0.jpeg">