User-agent: *
Allow: /

Disallow: /cgi-bin/

RewriteEngine on
RewriteCond %{HTTP_REFERER} !^$
RewriteCond %{HTTP_REFERER} !^http://doyano.sytes.net.*$ [NC]
RewriteCond %{HTTP_REFERER} !^http://www.doyano.sytes.net.*$ [NC]
RewriteRule .(gif|jpg|png)$ - [F]