jQuery animating along a sine wave

Question

I\'ve spent a couple days at this and I give up.

I\'m trying to get an object to animate along a sine wave infinitely. It should not end after the first period.

Answer 1

Change

 return {top: y + "px", left: current_x + x + "px"}; 

to

  return {top: y + "px", left: last_x + x + "px"};

See an updated fiddle