Protect website folders by .htaccess

<IfModule dir_module>
DirectoryIndex index.html index.php index.php4 index.php3 index.cgi index.pl index.htm index.shtml index.phtml
</IfModule>

<IfModule mod_rewrite.c>
RewriteEngine on

RewriteBase /

RewriteCond %{REQUEST_URI} !(css)
RewriteCond %{REQUEST_URI} !(js)
RewriteCond %{REQUEST_URI} !(images)
RewriteCond %{REQUEST_URI} !(videos)
RewriteCond %{REQUEST_URI} !(cache)

</IfModule>