[![Pic 1](https://i.stack.imgur.com/TYMcC.png)](https://i.stack.imgur.com/TYMcC.png)

[Instructable](https://www.instructables.com/id/3D-Printed-Speaker-Enclosures-With-Lights/)

Hey All I am trying to recreate something I saw in an instructable a while back I can't figure out how to do it. They used Maya.

So I create the basic shape( the left one) and used the *Boolean Modifier* difference and the result is on the right. There is a sphere on the inside the design and the design is extruded inward.

How can I get this fixed? Thanks.