1- Go To Your Blogger Dashboard
2- Click On Theme Section
3- Click On Edit HTML
4- Find Tag
5- Paste the code above body end tag
6- remove /* & */ before and after script tag.

.infinite-blockquote { position: relative; background: #f8f9fa; padding: 20px; margin: 15px 0; border-radius: 8px; border-left: 4px solid #0d6efd; font-family: ‘Courier New’, monospace; line-height: 1.6; color: #333; box-shadow: 0 2px 5px rgba(0,0,0,0.1); white-space: pre; overflow-x: auto; } .copy-button { position: absolute; top: 10px; right: 10px; padding: 6px 12px; background: #0d6efd; color: white; border: none; border-radius: 4px; cursor: pointer; font-size: 13px; transition: background 0.3s; } .copy-button:hover { background: #0b5ed7; } @media screen and (max-width: 768px) { .infinite-blockquote { padding: 15px; margin: 10px 0; } } /* */ document.addEventListener(‘DOMContentLoaded’, function() { const blockquotes = document.querySelectorAll(’.infinite-blockquote’); blockquotes.forEach(blockquote => { // Preserve formatting of the original content const formattedContent = blockquote.innerHTML; blockquote.textContent = formattedContent; const copyButton = document.createElement(‘button’); copyButton.textContent = ‘Copy’; copyButton.className = ‘copy-button’; blockquote.appendChild(copyButton); copyButton.addEventListener(‘click’, async () => { try { await navigator.clipboard.writeText(blockquote.textContent.replace(‘Copy’, ‘’).trim()); copyButton.textContent = ‘Copied!’; setTimeout(() => { copyButton.textContent = ‘Copy’; }, 1500); } catch (err) { copyButton.textContent = ‘Error’; setTimeout(() => { copyButton.textContent = ‘Copy’; }, 1500); } }); }); }); /* */

6- Go To Your Blogger Dashboard
7- Click On New Post
8- Now Open HTML View
9- Paste This line, There You Want To Add copy button
10- Replace “Example” With Your text

Example