How do you change BlurEffect with a button?

I was wondering how to change blur when pressing a ClickDetector part.

I'm new to coding but try this:

script.Parent.ClickDetector.MouseClick:connect (function() game.Lightning.("Name of your Blur Effect").Size = ("The number you want the blur to be") end)

this script will work if it is placed in the same parent as the ClickDetector

Hope this help