Spin-Wheel Landing Integration

I’m enhancing my sales landing page with a small but powerful “Spin & Win” feature and need a sharp front-end developer to plug it in seamlessly. The page is built in plain HTML, CSS and vanilla JavaScript—no frameworks or CMS in sight—so your solution must stay in that stack... (Budget: ₹600 - ₹1500 INR, Jobs: CSS, Frontend Development, HTML, JavaScript, PHP, User Interface / IA, Web Design, Web Development)