'Marquee or not marquee' or 'How to scroll text in HTML?'

The question could also be: should marquee be used as an element or as a css property?

Before I would elaborate on that, let me just give an example to the ones who have no idea what marquee means. This is basically an element or css property (see below which one is which) that allows you to make a simple text (or even image) scroll in a specified direction with a specified speed.