How to clear blurprints/ area

Hi all just wondering if there is quick way of removing all my blueprint designs/buildings? as most of these are just for practice and design projects without have to knock them down 1 plank/beam/block at a time.

This is not on a server just my own personal game

Loving this game.

Thank you took me a bit of time to work out how to even use "scripts" being that I've never used them before, but got there in the end saved a lot of time.

If anyone knows of a good tutorial on using / installing scripts in a server I would be greatful as we have just started a server and really could do with using them for protected area ect.

Many thanks.