canvas {
  display: block;
  position: absolute;
  left: 0px;
  top: 0px;
  right: 0%;
  bottom: 0px;
}

@media only screen and (min-width: 1000px) {
  canvas {
    display: block;
    position: absolute;
    left: 25%;
    top: 0px;
    right: 25%;
    bottom: 0px;
  }
}