gistfile1.js

var rotation = function (){
   $("#img").rotate({
      angle:0, 
      animateTo:360, 
      callback: rotation,
      easing: function (x,t,b,c,d){        // t: current time, b: begInnIng value, c: change In value, d: duration
          return c*(t/d)+b;
      }
   });
}
rotation();