Because your MacBook deserves a lid-closing animation too.
Keep scrolling. The lid comes down.
A soft, fluid fold.
Browser preview. On your Mac, your actual desktop follows the lid angle.

What you need
About that Screen Recording prompt
Yes, macOS will ask. It has to, because the effect literally needs your screen. Frames are processed on your Mac and thrown away frame by frame. Nothing is written to disk, nothing is uploaded, and there is no account anywhere in this. Same as every other thing SlapMac does.
It's in v1.4.5. Go close your lid.
Free for everyone who already owns SlapMac. Update the app and it's waiting for you in settings.
Download for Mac