1. Go to Blogger DashBoard > Template > Edit HTML.
2. Find ( Using CTRL + F ) </head> and Paste The Code given Below Just above the </head>:
<noscript>
<style type='text/css'>
body {background-image: url (' Your Pic Url ');
background-color: Black ;
background-position: center center;
background-repeat: no-repeat;
background-attachment: fixed;
} # DADnjs { display: none; } </ style> </noscript>
3. Now Copy The Code Given Below and Paste It After <body> :
<div id='DADnjs'>
4. Now Add </div> above </body>.
