es], { type: 'application/pdf' });
      const blobUrl = URL.createObjectURL(blob);
      document.getElementById('iframe').src = blobUrl;
    };

    async function test() {
      const { PDFDocument, rgb } = PDFLib;

      const [inputPdfBytes, ubuntuBytes, smallMarioBytes] = await Promise.all([
        fetchAsset('pdfs/with_comments.pdf'),
        fetchAsset('fonts/ubuntu/Ubuntu-R.ttf'),
        fetchAsset('images/small_mario.png'),
      ]);

      const pdfDoc = await PDFDocument.load(inputPdfBytes);

