How do I do this?

How do I create a button like this (picture show above) with the code for others to copy and paste my blog button on their blog. I have been searching google for "create a button for your blog" and I can't figure it out? Anyone have a tutorial I can follow. Comment below if you can help me out!


Update!!! I have figured it out and will work on a tutorial to share with others. I had to piece together several help links to figure it all out!