body {
  margin: 0;
  padding: 0;
  display: flex;
  justify-content: center;
  height: 100%;
  background-color: #000;
}

canvas {
  background: linear-gradient(
    180deg,
    #4357ad 0%,
    #465bb0 20%,
    #4c65b7 40%,
    #506aba 60%,
    #536ebd 80%,
    #5672c0 100%
  );
  touch-action: none;
}