1
2body { 
3  margin-top: 5%;
4  margin-left: 5%;
5  margin-right: 5%;
6  margin-bottom: 5%;
7  background-color: white;
8  color: black;
9}
10
11pre {
12  background-color: lightgrey;
13  color: black;
14  border: thin;
15  border-style: solid;
16}
17
18