How can I create a script like this? See below

I want to create a script that gives a part (10) health (In this case, a block in a building, "Building contains multiple blocks")

And a script for a tool, if the tool hits the block, remove (2) health. And if the block has (0) health then Destroy the block.

I already have the too made, just not scripted yet.

I've been trying to create this script for a whole day now. I'm new to scripting so I didn't have any success yet.

Any help of a way I could do it would be truly appreciated!