Hide control buttons using VBA

If you're looking at the excel sheet, what I'm trying to achieve is this:

As default buttons 5-8 should be hidden. When one of the buttons 1-4 is pressed, button 5 should be un-hidden. When another button, 1-4, is pressed, button 6 should be un-hidden an so forth.
When any of the buttons 5-8 are pressed, then the highest-numbered button of those visible, should be hidden.

Say I've pressed all of bottons 1-4, now all buttons are visible. I click on 8, now button 8 gets hidden. I click on 5, now button 7 gets hidden.


I've come along this piece of code, but can't seem to make it work.

ActiveSheet.Shapes("YourShapeName").Visible = False
If anyone can put it in a working sheet, or have a better approach, I'd apriciate it. I guess I'll also need some way to determine how many buttons are visible so I can hide/unhide the correct one, but I think I've got this figured out.

Beautiful