html, body {
  margin: 0;
  padding: 0;
background : grey;
}
canvas {
    position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

h1{
  margin-top: 100px;
  text-align: center;
  color: white;
    font-family: "Lucida Console", "Courier New", monospace;
text-shadow: black 0 -4px;
}