How to make a light switch go on and off?

So this is written from a tablet sooooo stick with me here.

-- put this script in the part you want to be clicked on to enable the light

local Light = script.Parent.Parent.SurfaceLight -- the light 
local Activation_Distance = 10 -- how many studs away it can be activated



local clicker = Instance.new("ClickDetector")
clicker.Parent = script.Parent
clicker.MaxActivationDistance = Activation_Distance

local db = false

clicker.MouseClick:Connect(function()
    if not db then -- if the variable (db) is false
        light.Enabled = true -- enable the light
    else -- if the variable (db) is true
        light.Enabled = false -- disable the light
    end
    db = not db -- make the variable (db) the opposite of itself
end)