How would I make a script where the property changes to certain parts in a model?

I don't have a script because I don't know where to even start with this. I'm trying to make a switch where when you press one side, it changes a few properties in a set of bricks, and when you touch the other side it disables the first set and activates the second set.

If anybody could point me in the right direction to make this that would help immensely, thanks.

Your going to start with two touch events on each part u want to change the properties with. Then you are going to set the property that the other part changes to the original value and change the desired property for when you touch that object.

local Players = game:GetService('Players')

local Part = workspace.Part -- Define Part

local OriginalTransparency = Part.Transparency
local OriginalReflectance = Part.Reflectance

Part1.Touched:Connect(function(Obj)
	local Player = Players:GetPlayerFromCharacter(Obj.Parent)
	if Player then
		Part.Transparency = 1
		Part.Reflectance = OriginalReflectance
	end
end)

Part2.Touched:Connect(function(Obj)
	local Player = Players:GetPlayerFromCharacter(Obj.Parent)
	if Player then
		Part.Reflectance = 1
		Part.Transparency = OriginalTransparency
	end
end)