html {
  margin: 0;
  padding: 0;
  width: 100%;
  min-height: 100%;
}

body {
  margin: 0;
  padding: 0;
  width: 100%;
  min-height: 100%;
}

canvas {
  position: absolute;
  width: 100%;
  height: 100%;
}

#turn {
  font-size: 2em;
  position: absolute;
  top: 0;
  right: 0;
}