Add New Button in Admin Panel

I am learning Plugin Development in WordPress. I have an Add New button in one of my Admin panel page like below.

enter image description here

I would like to redirect to http://127.0.0.1/wordpressplugin/wp-admin/admin.php?page=newAddress when click on it.

I wrote below code for this

But this code is not redirecting to that link. What is the solution ?

How did it done here ?

enter image description here

Thanks.

(Sorry for my poor English.)