Create unmovable piece?

I’m working in a module and I want to make a ‘button’ that cycles through different states. I learned how to use layers and images to make a piece cycle it through the different states, but I don’t know how to make the piece unmovable by anyone so it stays put and acts like a button. Didn’t see anything obvious in the trait list.

Thanks in advance!

You need the “Does not stack” piece trait. An option in that trait is to set the piece to Move: Never.