CSS3-Only Spinner Tests - Clock
        This is the default spinner created without any arguments to the mixin.  It is defined in css-spinner-clock.css.
        If you do not want to use Sass/Compass, you can just use the CSS file directly.
      
      @include spinner()
         
        These are tests using different sizes.  css-spinner-clock-custom.css contains these definitions.  Each was created using
        the arguements to the mixin as labeled below.
      
      @include spinner("size15", 15)
         @include spinner("size35", 35)
         @include spinner("size55", 55)