body {     
       
       background-color: black; 
       Background-attachment: fixed;
       background-position: center;
}

p {
	font-family:  Times New Roman, Georgia, Times, serif;
	font-size: 16px;
	color: white;
	
}
<background-image: url(http://www.thesand.net/csalva/images/images-1/Demons originale.jpg);>