Wsod activating theme

Hi all,

I copied the theme folder “Default”, named the new copy with a different name.

I then changed the top comment of my index.php to:

/*
Template Name: blabla
*/

I then changed the top comment of my style.css to:

/*
Theme Name: Bla bla
Theme URI:
Description: Bla bla
Author: Bla bla
Author URI:
Template: blabla
Version: 0.1
.
Created by  Bla bla
.
*/

I then went to admin panel and went to themes. Clicked activate on my template ‘Bla bla’ and it shows a white screen with nothing on it.

Any ideas?

Unfortunately can’t see anything now. Even out of admin panel.