For this example, I’ll add a file called custom_scripts.js, which is placed in a subfolder of the theme folder. Let’s start off by opening up sidebar.php in our editor and just adding in a new class name that we can use to style any widgets that get loaded up into any of the widget areas. Add flickr photostream, photoset or a single photo to your gallery!See the example with images from . Copy, paste, and do a little Googling to find out more about the problem. Changing the sidebar The sidebar will be easy.