body {
    background-image: url('sender_wall.png');
    background-color: black;
    background-repeat: no-repeat;
    background-attachment: fixed;
    background-position: center; 
}

img {
   position: absolute;
   top: 50%;
   left: 50%;
   width: 265px;
   height: 690px;
   margin-top: -345px; /* Half the height */
   margin-left: -132px; /* Half the width */
}