Change background in footer? How?

[kintim]

Hi all. I have a problem (my Presta 1.4.3). I need edit Footer HOOK but i dont know how...??
My problem:
how change width in footer hook? and insert my_background.
my_global.css

#footer {
   background-image: url('../img/bg_footer.png');
   background-repeat: repeat-x;
   width: 100%;
   border-top: 1px solid #d0d3d8;
   padding: 0.5em 0;
   clear: both;
}

[kintim]

and this is no end....)))
I need your help more. I have a good icon and i want paste it over my footer...
How i can do it???

[kintim]

I found the solution... how add icon ))))
i edit blockcms.tpl

<!-- MODULE Block footer -->
 /* add this stroke */

and after i edit my blockcms.css

#footer .my_cart {
   background-image: url("../../../img/icon/cart_img.png");
   background-repeat: no-repeat;
       width: 100px;
   height: 80px;
       position: absolute;/* it's very important */
       right: 0;
       bottom: 0;
}