html,
body {
  width: 100%;
  height: 100%;
  margin: 0;
  padding: 0;
  background-color: #e2e2e2;
  /* background-color: #212121; */

  margin: 0;
  display: flex;
  justify-content: center;
  align-items: center;
  
}
canvas {
  display: block;
}