Hello,
Your task need to be done using template of wordpress theme, a new template need to be created for this. And which ever page you want this html to show in you have to select the template while creating the page.
I would like to work on this project, I am having more than 10 years of experience in php and working in wordpress/drupal for more than 7 years.
Please initiate chat for further discussion. Awaiting your response.
Best Regards
BssvitualSoft