body {
	background: url('http://gdurl.com/YE-O') 
	 center center;
}
div.container {
	align-self: center;
	background-color: black;
	border-radius: 100%;
	margin: 100px 300px;
	height: 600px;
	width: 600px;
}
iframe {
	margin: 150px 20px;
	border: 3px solid white;
	border-radius: 1%;
}

#first {
  margin: 100px 20px;
}

a.main {
  color: #fff;
  background-color: black;
  border-radius: 10%;
  font-size: 18px;
  letter-spacing: 1px;
  text-decoration: none;
  padding: 2px;
  font-family: serif;
  }
  
#main {
	margin: 0 500px;
}