1.Login to your Bogger Dashboard and go to Design >> & Page Elements.
2.Click on 'Add a Gadget' on the sidebar.
3.Select 'HTML/Javascript' and add the one of code given below
<img src="https://lh6.googleusercontent.com/_u4rBCfM4eII/Taqh2ihtDBI/AAAAAAAABo4/FApbdtGUtWQ/1.png" width="125" height="125" alt="Blogger tricks and toolz" />
Look at the example below:
4. Now Click on Save "Html Java Script" and You are done..