Well, you replied that I was right to my post here, about an hour ago: https://discussions.unity.com/t/whats-wrong-in-this-code-its-done-thanks/1559108/4, when I said: “When asking a question, you should always provide as much information as possible, such as what you’re trying to achieve, what you’ve attempted so far, what’s happening, what you expected to happen.”
Why don’t you start trying that now? Like, what is the script you want to have a reference to? What ways have you tried to make a reference to it, what has happened with the things you tried and couldn’t make a reference to it, and what you expected to happen?