html {
  width: 100%;
  height: 100%;
}body {
  width: 100%;
  height: 100%;
  margin: 0px;
  background-color: black;
  display: flex;
  justify-content: center;
  align-items: center;
}
img {
  width: 32px;
  height: 32px;
  display: block;
}
canvas {
  display: block;
}