body {
  color: black;
  background: yellow;
}

div.mapthing {
  color: blue;
  background: pink;
  border: solid;
  border-width: 10px;
  position: fixed;
  top: 10px;
  left: 10px;
}

div.anotherone {
  color: yellow;
  background: black;
  border: solid;
  border-width: 3px;
  position: fixed;
  top: 10px;
  left: 400px;
}