body {
  background-color: #000000;
}
h1 {
  color: blue;
}
p {
  color: red;
}
.center {
  display: block;
  margin-left: auto;
  margin-right: auto;
  width: 50%;
}
.container {
    width: 800px;
    margin: 0 auto;
    padding: 20px;
}
.img-responsive {
max-width: 100%;
height: auto; 
display: block;
}
#preloader {
    position: absolute;
	padding-top: 215px;
    top: 1000;
    left: 500;
    width: 800px;
    height: 600px;
    background: #000000 url('loading.gif') no-repeat center center;
    background-size: contain;
    z-index: 9999;
}