How to Redirect using htaccess

[AJ Blacklisted]

I started a new website which was an IPB forum (Pages indexed by google)
I want to redirect the pages to my new sites homepage to avoid crawl errors.
old forum thread starts like domain.com/topics/*******
What to add in htaccess in order to implement it.

 

[Lifetalk]

You want any and all pages to redirect to your new site's root/home page only?

 

[AJ Blacklisted]

You want any and all pages to redirect to your new site's root/home page only?

Yes, All pages of the old site,

 

[Hacker007]

RedirectMatch 301 ^/topics/.*$ http://www.new-domain.com

 

[Lifetalk]

RewriteEngine On
RewriteRule ^(.*)$ http://mysite.com [L]