/* Website.css*/
header{
  background-color: lightgray;
  border: solid 1px black;
  font-family: serif;
  text-align: center;
}

footer {
  padding: 10px;
  border-radius: 3px;
}

body {
  font-family: sans-serif;
  font-size: 20px;
  background-color: white;
  margin: 20;
  position:absolute;
  left: 50px;
  text-align: left;
  margin-right: 100px;

}

* {
  margin:0px;
  padding:0px;
  font-family: sans-serif;

}

#sidebar {
  position: absolute;
  right: 0px;
  top: 150px;
  width: 200px;
  height: 100%
  padding:0;
  background-color: lightblue

}
<!-- CSS has given me the most trouble by far. At first it wouldn't show 
regardless of what I tried to do. It wouldn't mould to my will and it 
was extremely frustrating, but I think I have the hang of it now-->