How to display the last posts or comments on the sidebar?

How to display the last posts or comments on the sidebar?

1. Enter the administrator page elements (Dashboard → Design or Dashboard → Layout in the new Blogger design).
2. Add a new feed widget, with the following URL’s:To show the recent posts type this code:

   http://yourblogname.blogspot.com/feeds/posts/default

   To display the latest comments type this code:
   

   http://yourblogname.blogspot.com/feeds/comments/default