html,
body {
  height: 100%;
}

body {
  align-items: center;
  background-color: #000;
  display: flex;
  overflow: hidden;
  justify-content: center;
}

canvas {
  background-color: #000;
  box-shadow: 0 0 0 3px #fff;
  cursor: -webkit-grab;
  cursor: grab;
  display: block;
}

canvas:active {
  cursor: -webkit-grabbing;
  cursor: grabbing; 
}