you can Create mixins via the @mixin rule. The @mixin
keyword must be followed by the mixin name and a declaration block.
The following lines define a mixin, and give it three property-value pairs:
@mixin .shadow{
box-shadow: 5px 0 0 0px #ccc, 0px 5px 0 0px #ccc, 5px 5px 0 0px #ccc, 0px 10px 0 0px #ccc, 5px 10px 0 0px #ccc, 0px 15px 0 0px #ccc, 5px 15px 0 0px #ccc;
-webkit-box-shadow: 5px 0 0 0px #ccc, 0px 5px 0 0px #ccc, 5px 5px 0 0px #ccc, 0px 10px 0 0px #ccc, 5px 10px 0 0px #ccc, 0px 15px 0 0px #ccc, 5px 15px 0 0px #ccc;
-moz-box-shadow: 5px 0 0 0px #ccc, 0px 5px 0 0px #ccc, 5px 5px 0 0px #ccc, 0px 10px 0 0px #ccc, 5px 10px 0 0px #ccc, 0px 15px 0 0px #ccc, 5px 15px 0 0px #ccc;
}