If you want to create sliders with other images, you can use the gallery tag

<gallery type=slideshow>

It won't work like this script, but it does provide a slideshow gallery.

Thank you for the response but for my purposes I would rather have a different format from the slideshow, hence the custom script. Do you know how to make this script work more than once on a single page?

You can't repeat it similarly to what you did to the main page?

No, well I am not using it on my main page. But when I use it on a page it works fine, if I use the exact same script again it will only show its first usage.

I believe it can't be used more than once as it was intended for the main page. Apologies. :/