body {
  background: black;
  color: white;
}

/* JavaScript */
.message {
  text-align: center;
  padding: 10px;
  font-size: 2rem;
}

.box {
  width: 100px;
  height: 100px;
  position: relative;
  top: 50px;
  left: 20%;
  background-color: cornsilk;
  border: 1px solid black;
  font-size: 1.5em;
  line-height: 100px;
}