User-agent: *

Disallow: /old_site
Disallow: /Meh
Disallow: /b/concrete
Disallow: /b_old
Disallow: /extra

Disallow: /blocks 
Disallow: /concrete 
Disallow: /config 
Disallow: /controllers 
Disallow: /css 
Disallow: /elements 
Disallow: /helpers 
Disallow: /jobs 
Disallow: /js 
Disallow: /languages 
Disallow: /libraries 
Disallow: /mail 
Disallow: /models 
Disallow: /packages 
Disallow: /single_pages 
Disallow: /themes 
Disallow: /tools