Скопируйте код с этой страницы и вставьте его в ваш файл index.html

<html> <head> <meta http-equiv="X-UA-Compatible" content="IE=edge" /> <meta charset="utf-8" /> <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no"> <title>Marquiz</title>  <script> (function (w, d, s, o) { var j = d.createElement(s); j.async = true; j.src = '//script.marquiz.ru/v2.js'; j.onload = function () { if (document.readyState !== 'loading') Marquiz.init(o); else document.addEventListener("DOMContentLoaded", function () { Marquiz.init(o); }); }; d.head.insertBefore(j, d.head.firstElementChild); })(window, document, 'script', { host: '//quiz.marquiz.ru', region: 'eu', id: '67653e674183ac00261a06e7', autoOpen: 0, autoOpenFreq: 'always', openOnExit: false, disableOnMobile: false }); </script>  <style> .marquiz__bg_open .marquiz__modal { max-width: 100% !important; min-height: 100% !important; width: 100% !important; height: 100% !important; padding: 0 !important; } .marquiz__bg_open .marquiz__frame_open{ height: 100% !important; } #marquiz__close { display: none } </style> </head> </html>