MediaWiki:Common.js

Note: After publishing, you may have to bypass your browser's cache to see the changes.

Firefox / Safari: Hold Shift while clicking Reload, or press either Ctrl-F5 or Ctrl-R (⌘-R on a Mac)
Google Chrome: Press Ctrl-Shift-R (⌘-Shift-R on a Mac)
Internet Explorer / Edge: Hold Ctrl while clicking Refresh, or press Ctrl-F5
Opera: Press Ctrl-F5.

/* Any JavaScript here will be loaded for all users on every page load. */
const backgrounds = [
    'url(https://christianpedia.site/images/3/37/Main_page_background.jpg)',
    'url(https://wallpapercave.com/wp/wp9066757.jpg)',
    'url(https://getwallpapers.com/wallpaper/full/f/7/2/1001822-church-wallpaper-1920x1080-laptop.jpg)'
];

let currentIndex = 0;

function changeBackground() {
    document.body.style.backgroundImage = backgrounds[currentIndex];
    currentIndex = (currentIndex + 1) % backgrounds.length;
}

setInterval(changeBackground, 4000); // Change image every 4 seconds (4000 milliseconds)