body {
  background-image: url('https://i.pinimg.com/originals/4d/e4/ec/4de4ecd3cc08b920227e2621d9d49b54.gif');
  background-size: 30%;
  background-repeat: repeat;
  background-attachment: fixed;
  color: black;
  font-family: "Arial", "Helvetica", sans-serif;
}

.sidebar {
  float: left;
  margin: 10px 10px 10px 20px;
  width: 20vw;
  height: 90vh;
}