In my proyect, I have a lever that, when is pulled, it sends a signal to a plataform to activate it so you can step on it when you do so. The problem is that when I duplicate the plataform only the origial is the one that receives the signal and get activated. How can I do so all the plataforms receive the same signal? Do I have to use groups? How? I am just starting with Godot so I am kinda confused.