First go to your word press admin and click on "custom file editor" in thesis options. Select custom_function.php in file selected menu and click on "edit selected file". Because of warning, we need to do it via ftp. So go to that ftp path which is showing in the video and open up the launch.php. Now copy that code which is showing in the video and past it in there, close and save the file. Now to change the style of your search box, go to your custom file editor, select the custom.css and click on the "edit selected file". Now copy that second code and paste it in there and click on the save button. Now you can check your site for the changes.