Hi SugarHeroes!

I'm new to SugarCRM.
I've created a file upload screen on my custom module.
During upload of large sized files, the screen hangs (which means the system is still loading the file).
Instead of the hanging screen, I'd like to replace it with a "loading animation".
Something that could use a modal, or possibly anything that will allow me to display such loading animation.
I would also the animation to stop if the loading of the file is done.

Is this even possible in sugarCRM?

I'm using v5.5.4.

Thanks