html, body {
  background-color: Black;
  width: 100vw;
  height: 100vw;
  margin: 0;
  padding: 0;
  display: flex;
  justify-content: center;
  align-items: center;
  overflow-y: hidden; /* Hide vertical scrollbar */
  overflow-x: hidden; /* Hide horizontal scrollbar */
}

canvas {
  display:block;
  max-width: 100%;
  max-height: 100%;
  bottom: 0;
  left: 0;
  margin: auto;
  overflow: auto;
  position: fixed;
  right: 0;
  top: 0;
  -o-object-fit: contain;
  object-fit: contain;
  background:Black;
}