Step # 1-
First sign into your Google Blog.
The 'Dashboard' comes up.
If you are following more than one BLOG, you will have to set this function on each one.
Select, 'Layout' (see picture below).
Step # 2-
Select - 'Add A Gadget' (see picture)
You get a pop up window.
Step # 3-
Click on 'Add Followers'
'Followers' should appear just under 'Add A Gadget' (see picture)
Go to - View Blog
If done, sign out.
Too be safe, after any change always view your Blog in a non sign out mode (the way anyone else would view it).