Need help - copy to clipboard

Hey guys, I have an HTML embed block on my webpage. I want users to be able to click on the HTML block and it will copy a “TEXT” I set. I want it to confirm with a message saying “COPIED” to clipboard afterwords. Any ideas on how to create this?

Here is my site Read-Only: LINK
(how to share your site Read-Only link)

You can do this with some 3rd party JS such as:

What Aviv said. Also have a look here for already implemented example.