Mam Mary thank you so much for your help. I tried to open the above link, and try to paste the code at the ADD HTML/Within Head panel and try to put a href target page, but the Hello World is still display on the top of the target page when I click the button.
I want that when the users click to "proceed" button it will display the courses and the Hello World message will not display anymore, another banner or message will display on the top, not Hello World anymore. How to do this mam Mary.