See the above screenshot. Cool and awesome search boxes from Google. Which one you like? Here is the step-by-step instructions to add this widget to your blog.
Step 1. Go to this LinkCSE Home. Enter your Site name and click Create.
Step 2. Next you will see a page with the below message. Now click Control Panel.
Step 3. On the left pane click "Look and feel", Under "Layout", select the one you want. It's about how you want to display the search results.
Step 4. Now click on "Themes". When you click on a theme you can see the preview on the right pane. Google also provides you the option to change colors. For that, click Customize.