How to create a shadow box on a box

Meaning that we can create a shadow on the box that is on the blog as in the sidebar,post,header and also on other parts.example shadow box as below
To how to apply it to the blog,we try to edit on the sidebar blog.way follow the steps below

1. Login keblogger,then setting layout
2. Then click template designer>advanced>add
   ccs.And enter this code intro it
3. Then the result will ebe like the example of the
   Shadow box above
4. And click apply to blog,to complete edits

Here are some examples of shadow box code or shadow boxes that you can use in blogs