I need a lightweight web page that keeps one specific ticket-sales site under constant watch and lets me know the instant seats/category appear. The checker should refresh automatically every few seconds, show the current status in real time, and fire both a loud beep and a bold on-screen banner or colour change whenever availability flips from “sold out” to “on sale” D10 sector for example The project is limited to a single website and runs purely on the web—no mobile or desktop builds—so a simple HTML + JavaScript (or a small React/Vue front end if you prefer) is plenty. Low overhead and fast response matter more than fancy design. Please keep external dependencies minimal so the page can live on any standard browser or a basic static host. Deliverable: • Complete, well-commented source code • README with instructions for changing the target URL and polling interval I’ll sign off once I can load the page, watch it poll live, and see/hear the alert when I toggle availability on a test listing.