body {
  margin: 0;
}
.non-js {
  display: flex;
  width: 100vw;
  height: 100vh;
  align-items: center;
  justify-content: center;
  background: repeating-linear-gradient(
    #0e0808,
    #181010 50vh,
    #181010 150vh,
    #0e0808 300vh
  );
}