Copy this code and put it in an "HTML" gadget. If you need detailed instructions go HERE.
<style type="text/css">body {background-image:
url('https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi4aIBYddOC2E4FX9N9uiC6B1pyTgfWuOBdASPElp9r_c7R4raOThMCx8UwnsL8qvHx6je1iWo1w1O3GdlanDnHTuRY35FW_8d-PPKGvjZeOIdG9zzTcxlItu0_3DLPnVsty_1aLkJMjs0/s1600/Slide12.JPG');
background-position: top; background-repeat: no-repeat; background-attachment: fixed;
}</style><div id="tag" style="position:absolute; top:30px; left:0px;
border:0px;"><a href="http://www.designsbyfarmgirl.blogspot.com" target="_blank"><img
border="0"src="http://i1213.photobucket.com/albums/cc463/MNFarmGirl/backgrounds/DBFGLogo.gif" width="185"/></a></div>
url('https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi4aIBYddOC2E4FX9N9uiC6B1pyTgfWuOBdASPElp9r_c7R4raOThMCx8UwnsL8qvHx6je1iWo1w1O3GdlanDnHTuRY35FW_8d-PPKGvjZeOIdG9zzTcxlItu0_3DLPnVsty_1aLkJMjs0/s1600/Slide12.JPG');
background-position: top; background-repeat: no-repeat; background-attachment: fixed;
}</style><div id="tag" style="position:absolute; top:30px; left:0px;
border:0px;"><a href="http://www.designsbyfarmgirl.blogspot.com" target="_blank"><img
border="0"src="http://i1213.photobucket.com/albums/cc463/MNFarmGirl/backgrounds/DBFGLogo.gif" width="185"/></a></div>