Each slot embeds one of your existing pages exactly as-is — any format, any of your dashboards (team-scoreboard-animated.html, view.html, team-scoreboard-podium.html, a rules page, whatever). This wrapper only switches which one is shown; it never rebuilds or touches the page's own content.

If the URL includes ?t=CODE, it's also polled quietly in the background (using team_rank) purely to detect rank changes — the iframe itself is never reloaded for this. Pages without ?t= just take their turn in rotation with no background check. Minimum 2 levels — the third is optional.