Go To This Page .
You’ll find a small form will ask you to customize your badge and then you’ll get your code in less than 2 minuets.
Twitter account: Type your twitter account user name
Label: Choose your favorite twitter badge label.
Color: choose your badge color.
Side: where do you want your twitter badge to be displayed.
From top: The space between top and badge in pixels.
After Customizing your badge click Update Code
You’ll see your code after you press Update Code button, copy the code and read step 2.
Go to your blogger account dashboard, go to Layout >> Page Elements.
And on your template side bar, click Add A Gadget
then choose HTML/JavaScript.
Leave the title empty and at content area past the code that you copied at step 1.
Then press save.
And Now, Enjoy.