Basically, I don't really know how to do it, I can't even give it a go.
I know how to get mouse and the target
local theMouse = game.Players.LocalPlayer:GetMouse()
print(theMouse.Target)
This will just print on what the mouse is Targeting, but how can I change the brickcolor of what the mouse is hovering to?

2 comments
attempt to index nil with 'IsA'
Change the ‘ to a normal quotation mark because my keyboard is weird, and it should work.