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).

Key points you’ll handle
• Create the popup inside Popup Maker Pro.
• Embed the JavaScript so it executes on page-load without requiring an extra click.
• Limit display to the specific pages I’ll list once we start; no popup on the rest of the site.
• Ensure fullscreen to block page until action is taken.

Deliverable
A working popup, using POPUP MAKER PRO in WordPress, plus any custom CSS/JS you add in a separate file or clear code block. Once installed I expect to refresh the target pages and see the promo open, attempt fullscreen on user's browser.