pretty much, but not really different widths, you're just wasting a ton of material if you do it that way. you want the side-view to be more like this

Maybe look into RV leveling feet/blocks

How do I get birds out of a wall?

Some birds built a nest in a block wall where it had began crumbling over a window. I want to seal it up and repair it, but I don't want to accidentally trap any inside.

Any ideas to flush em out? I can't see the nest