I'm making a 3D Companion Cube from Portal for fun and for a future animation (but mostly for fun), and I need some help!
So this is what I've got so far:

So yeah, heh, not much but a start. It's a full cube, by the way.
So I need help with how to make the circle with the heart on it stick out. I have it sticking out, but I'm trying for figure out how to do the edge.
Here's a picture because I'm terrible at explaining:

See, I have it sticking out like I want, but how should I do the edging so it actually looks like it's connected?
Thanks for you time guys!
(I'm using Anime Studio 9.2)