body {
  margin: 0;
  padding: 0;
  background: black;
  }
  
  
  canvas {
  max-width: 100%;
  max-height: 100%;
  margin: auto;
  overflow: hidden;
  position: fixed;
  object-fit: contain;
  justify-content: center;
  align-items: center;
  align-content: center;

  }