Redirect all pages except some folders

I want to redirect all links except few folders
www.example.com www.example.com/foo should be redirected, but

www.example.com/bar should not be redirected.

RewriteCond %{HTTP_HOST}    ^(.*)(example|example1)\.com$
   RewriteCond %{REQUEST_URI}    !^/bar(.*)$
   RewriteCond %{REQUEST_URI}    !^(.*)(sitedown.html)(.*)$
   RewriteRule ^(.*)$    http://www.example.com/sitedown.html [R=307,L]
 

I tried with above lines in my virtual hosts file (httpd-vhosts.conf) but these are not working.
I get redirected to sitedown.html for all links.

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