#bg {
  	position: fixed;  
	  width: 100%; 
	  height: 100%;
	  background: black;
	}
    #image {
	position: absolute; 
  	top: 0; 
  	left: 0; 
  	right: 0; 
  	bottom: 0; 
  	margin: auto; 
  	max-width: 100%;
  	max-height: 100%;
  	min-width: 50%;
  	min-height: 50%;
    }

/* START Responsive */
@media (max-width: 700px) {
}

@media (min-width: 700px) {
}
/* END Responsive */