Toggle display/non-display of objects

[cemo20205]

I am creating an AR application using Vuforia.

I want to make 3 objects appear one by one with a button, but the script is not reflected.
I have looked on various websites, but as a C# newbie, I could not figure out how to fix it.

screenshot of a code editor

// share your code here instead

They are combined because only one image can be uploaded, but they are originally separate scripts.

What am I doing wrong ?

[cemo20205]

１Sorry.
I don’t know how to add a Debug.
I’ve been trying to figure it out, is that correct?
If I am wrong, I would like to know.

[cemo20205]

I did as shown in the image, but there were no errors in the console.
Is there a mistake in the script?