Redirecting Old blog address to a new blog address permanently in blogger

I'm having a blogger blog and it's custom domain expires in a week. So, I planned to create a new blog and redirect the custom domain to the new blog domain. Consider, my old domain is old-blog.blogspot.com and I wish to redirect all the links to the old blog to my new address new-blog.blogspot.com. So, was there any ways doing it?

As I googled, I read about doing that with blogger conditional statements and that should be done for every post. But, in my blog I've more than 200 posts. Any ways?