#container {
  width: 800px;
  height: 860px;
  border: 1px solid black;
  margin: auto;
}
#spiral {
  position: relative;
  width: 800px;
  height: 800px;
  background: steelBlue;
}
#spiralControl {
  position: absolute;
  top: 800px;
  width: 800px;
  height: 60px;
  background: lightgrey;
}
#msg {
  color: white;
  font-size: 30px;
}