body {
  background: #21004d;
  background: radial-gradient(
    circle,
    rgba(33, 0, 77, 1) 0%,
    rgba(8, 19, 33, 1) 100%
  );
  margin: 0px;

  width: 100vw;
  height: 100vh;

  display: flex;
  justify-content: center;
  align-items: center;
}

canvas {
  max-width: 90%;
}