html {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background-color: white;
}
body {
  width: 100%;
  height: 100%;
  margin: 0;
  background: black;
  max-width: 100%;
  max-height: 100%;
  overflow: hidden;
}

.instructions {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  color: white;
  font-size: 2em;
  text-align: center;
  z-index: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  font-family: Arial, Helvetica, sans-serif;
  animation: fadeout 1s 4s ease-in-out forwards;
}
/* Fade out the instructions */
@keyframes fadeout {
  from {
    opacity: 1;
  }
  to {
    opacity: 0;
  }
}