body {
  background-color: aquamarine;
  font-family: arial;
  text-align: center;
  background-image: url("../banner.png"), url("../banner.png");
  background-position: right top, left top;
  background-repeat: repeat-y, repeat-y;
}
a {
  background-color: powderblue;
  color: black;
  width: 300px;
  border: 2px solid green;
  padding: 10px;
  margin: 19px;
  text-decoration: none;
}