body {
  margin: 0;
  height: 100vh;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  background: black;
}

svg {
  max-height: 100vh;
  background: lightgray;
}

svg.lit {
  background: white;
}

path {
  fill: transparent;
}

path.up {
  fill: black;
}