*,
*::after,
*::before {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

body {
  height: 100vh;
  width: 100%;
  display: flex;
  flex-wrap: wrap;
  place-content: center;
  background-size: 64px;
  background-color: #000;
  animation: sepia 1s linear infinite alternate;
  overflow: hidden;
}

canvas {
  position: fixed;
  inset: 0;
}

@keyframes sepia {
  0% {
    filter: sepia(0) hue-rotate(-360deg);
  }
  100% {
    filter: sepia(100%) hue-rotate(360deg);
  }
}