Building Web Layout Diagrams in Google Docs with Apps Script

function insertImagesIntoTable() {
  // Create a new Google Document
  const doc = DocumentApp.create('Web Layout Diagram');
  const body = doc.getBody();

  // URLs of the images
  const imageUrls = [
    'https://dummyimage.com/600x400/000/fff&text=Header',
    'https://dummyimage.com/600x400/ccc/000&text=Sidebar',
    'https://dummyimage.com/600x400/ddd/000&text=Content'
  ];

  // Fetch images and store as blobs
  const images = imageUrls.map(url => UrlFetchApp.fetch(url).getBlob());

  // Insert a table with specific dimensions
  const table = body.appendTable();
  const numRows = 2;
  const numCols = 2;

  // Create cells with placeholder text
  for (let i = 0; i < numRows; i++) {
    const row = table.appendTableRow();
    for (let j = 0; j < numCols; j++) {
      row.appendTableCell('Placeholder');
    }
  }

  // Replace placeholders with images
  table.getCell(0, 0).clear().appendImage(images[0]);
  table.getCell(0, 1).clear().appendImage(images[1]);
  table.getCell(1, 0).clear().appendImage(images[2]);

  // Save and close the document
  doc.saveAndClose();

  Logger.log('Document created: ' + doc.getUrl());
}