Fullscreen Promo Popup for WordPress

I need a promotional-offer popup built in my WordPress site using Popup Maker Pro. As soon as the chosen page loads, the popup should appear and immediately run a small JavaScript snippet that puts the visitor’s browser into full-screen mode (via the Fullscreen API)... (Budget: $30 - $250 USD, Jobs: CSS, Frontend Development, HTML, JavaScript, PHP, Web Application, Web Design, Web Development, Website Optimization, WordPress)