html {
    background-color: black;
    background-image: url('http://img4.wikia.nocookie.net/__cb20070819174055/uncyclopedia/images/b/be/200px-Dancing_Banana.gif');
    color:lime;
}
h1{color:#ff000;}
    img{border:5px dashed blue;}
     .Boooooooooooooooooooooooooom img{border:5px dashed red;}