html, body {
  margin: 0;
  padding: 0;
  background: #000;
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100vw;
  height: 100vh;
    -webkit-touch-callout: none; /* iOS Safari */
    -webkit-user-select: none; /* Safari */
    -khtml-user-select: none; /* Konqueror HTML */
    -moz-user-select: none; /* Old versions of Firefox */
    -ms-user-select: none; /* Internet Explorer/Edge */
    user-select: none; /* Non-prefixed version, currently
                    supported by Chrome, Edge, Opera and Firefox */
                      /* cursor: none;*/
}
canvas {
  display: block;
  position: absoluteo;
}