body {
  user-select: none;
  overflow: hidden;
}

#ui {
  display: none;
}

@keyframes blink {
  0% { opacity: 1; }
  50% { opacity: 0; }
}

svg {
  position: absolute;
  animation: blink normal 1s infinite ease-in-out;
  fill: red;
  top: 42.1vw;
  left: 15.4vw;
  width: 3vw;
  height: 3vw;
}