How do I make ring sprite with a ball in it

How do I make a ring object and a ball that moves inside it?
Thanks

Assuming it does not need to have much other function... "and you have the sprites" just place the overlapping ball inside the ring and activate the (sine) behavior for the ball. adjust sine output as need. ??


good luck!

Oh sorry, it should have physics and to move freely.

Oh sorry, it should have physics and to move freely.

like this?Capx Download

cheers