Create moodle quiz plugin as per demo link

I have a moodle site running on Moodle 3.1 I want Quiz as per demo link (see below). You have to create new moodle plugin. Working of new plugin must be 100% as per demo link. I also have payment gateway integrated into it. So you have to make sure that your code doesnt conflict with any of existing plugins. My website: [login to view URL] Demo link: [login to view URL]@@M163 You can check screenshots on how the final quiz should look like.