[GELÖST] index.html /body tag

Hello,

I want to display an interactive avatar on the home page.
I inserted the attached html code in the index.html as well as in the Dentist-index.html, but without result. The created index.html files had no content, so no body tag in advance?
Can someone tell me the complete and correct html code so I can view the avatar?

Thank you very much

How to add a code to the template
docs.astroidframe.work/category/custom-code

Hat funktioniert, Danke