Hide and lock cursor?

I'm really newbie for all things (including programming), and i need a script that starts with the mouse invisible and locked and when i press esc it's turn visible and unlocks.

Probably it's not that difficult, but i'm having problems with that xD.

-Sorry for the bad 30% Google Translated english and the newbie question

 

This will lock it to the center of the screen and hide it.

Code (csharp):

1. Cursor.lockState = CursorLockMode.Locked;
2. Cursor.visible = false;

Then to unlock and make it visible.

Code (csharp):

1. Cursor.lockState = CursorLockMode.None;
2. Cursor.visible = true;

 

Thanks