To set a background HD wallpaper quickly, you can use the cssstyle package. Here's a brief snippet in JavaScript:

const cssStyle = require('cssstyle');

// Set the CSS style for the body element
const style = {
  'background-image': 'url("https://example.com/hd-wallpaper.jpg")',
  'background-size': 'cover',
  'background-position': 'center'
};

// Apply the style to the document body
document.body.style.cssText = cssStyle(style);

This code sets a background image for the body element using the cssstyle package. You can replace "https://example.com/hd-wallpaper.jpg" with the URL of your desired HD wallpaper.

Note: This code assumes you're running it in a browser environment where you have access to the document.body element.