animated gif problem,Please help?

[zargon48]

Please help!,
Im trying to get this simple animated gif,[please see file atatchment,
thats the only way I knew to post the gif],
as you see the animation is very-bumpy(for lack of a better-word),
and I wish it to be "A Smother animation", Im just guesing, but
would it be easier to have the top "object" follow a curved-path
(a curved-line?) to smooth-out the animation?, if so,how
do I do it?, or, any other ways to do-it?, would be greatly appreciated!!

thank you!!

John.