How do I make a variable for several different parts?

[hollow token]

I'm brand new to scripting and unsure how to make my variable effect multiple parts in a folder, it only seems to work on the first part it finds in the workspace.

I'm just trying to make a simple obby that when you step on a "platform", it will go invisible and uncollidable, then in 2 seconds it'll come back. It works but only on the first platform in my folder, then it just doesn't work on any other part.

[elder inlet]

You can put each platform into a folder, and loop through that folder with the code you want to be replicated for each part