How do I make a part activate another part's code ontouch?

Hi, FrostandFireGaming. I will be helping you regarding the question, "How do I make a part activate another part's code ontouch?"

Now this question has technically been answered by @TheArcticTerminal however his code results in bigger errors. When you run his code, you see something you don't want it to happen

The Touched event does not only activate when a player touches a part. It also activates when a part is touched by another part, in this case, the baseplate Hence, the part will already be transparent when you press play.

A fix to this is simple.

-- Declaration Section 
--//Game Services
local Workspace = game:GetService("Workspace") 

--//Part Locations 
local ClickPart = Workspace:FindFirstChild("ClickPart") --Touching Part
local ChangingPart = Workspace:FindFirstChild("ChangingPart") --Changing Part


-- Processing Section 

local function changingPartsProperties (Hit) --Creating function [The `Hit` is a parameter which tells us `What touched the part?`
    local Character = Hit.Parent
    local Humanoid = Character:FindFirstChild("Humanoid") --Checking if what hit the part has a humanoid

    if Humanoid then --If humanoid is found then....
        print("Changing Properties")
        ChangingPart.Transparency = 0.5
        ChangingPart.CanCollide = false
    end
end

--Connecting Section

ClickPart.Touched:Connect(changingPartsProperties) --Connecting `Touched` event

What I did differently

Humanoid property is inside every player's character. A normal parts do not own one. Hence, the code will not run until a Humanoid part touches the brick. For our case, the Local Player

Have a lovely day of coding!

This could be done using a simple Touched event.

For example.

part = workspace.part 
otherPart = workspace.part

part.Touched:connect(function()
    otherPart.Transparency = 0.5
end)

Or, in this case you would want a button so, in a part, insert a ClickDetector.

button = workspace.part:WaitForChild("ClickDetector")
part = workspace.part
part.CanCollide = false

button.MouseButton1Click:connect(function()
    part.CanCollide = true
    wait(5)
    part.CanCollide = False
end)

You'll have to make both parts a parent of a script, one being the child of the other. I've made key card doors like this. All you have to do is do script.parent.parent. Hope this helps!