Allowing embedding

I want to allow my visit .. to embed content from my website...

I added few lines of code.. and now..

others can embed the content from my site. Like:

http://scholarshiplink.info/undergraduate-graduate-journalism-students-google-journalism-fellowships-usa/
.................
For this, I added few line of code in single.php.

But this not attractive. I want more attractive heading and box like this website:

http://www.minigamesfever.com/driving/slug-racing

so, that others can happy embed my website content.

Thank you very much.
Jay