body {
  background-image: url("https://images.pond5.com/purple-night-sky-animated-stars-footage-089542279_prevstill.jpeg");
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
}

div {
  align-items: center;
  text-align: center;
  border-radius: 25px;
  height: 300px;
  width: 1000px;
  background: linear-gradient(to bottom, #000000 0%, #020094 100%);
}
canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}
span {
    color: yellow;
    bottom: 0px;
    position: absolute;
    right: 0px;
    font-size: 40pt;
    font-weight: bold;
    text-align: right;
    vertical-align: bottom;
    font-family: monospace;
}