body {
  background-color: black;

  width: 100%;
  height: 100%;
  padding: 0;
  margin: 0;
}

canvas {
    padding-left: 0;
    padding-right: 0;
    margin-left: auto;
    margin-right: auto;
    display: block;

}


  /* leave it to hide the scrollbars */
  overflow: hidden;
}