html, body {
  position: absolute;
  top: 0px;
  left: 0px;
  right: 0px;
  bottom: 0px;
  padding: 0px;
  cursor: none;
  margin: 0px;
  overflow: hidden;
  display: flex;
  height: 100%;
  width: 100%;
  background-color: #000;
}

canvas {
  margin: auto auto;
}