body {
  display: flex;
  height: 100vh;
  background-color: #111;
}

canvas {
  margin: auto;
}

span {
  color: #777;
  position: absolute;
  top: 20px;
  left: 20px;
  -webkit-user-select: none;
     -moz-user-select: none;
      -ms-user-select: none;
          user-select: none;
}