1. Go to www.blogger.com and then Dashboard and chose new post when start to write your new post and where place you want to add HTML code and want to around border. This is very simple that go to Edit HTML and paste the following code where place do want to add HTML code with border.
2. It is very necessary that first before applying you should parsed your HTML code in Blogger post first parsed it how to parse your code click here.
In view of the above border change the width, height and also colors to match with your blogger template for your blogger post. Now add parsed HTML code at the place of Red color in the above box replace of Blog Bogger training. But do not forget to parse your HTML code otherwise you can not see your HTML code in the box.
I hope you have understood above method if you like it please leave your comments.