html, body {
  height: 100%;
  margin: 0;
}
body {
  background: url(https://drive.google.com/uc?export=view&id=1G6V25fccgkzOGJ269L8McqEPiMt58nZO) center/4%,  linear-gradient(#dcd3b2AA, 90%, #00d0e8AA);
}

External CSS

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External JavaScript

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