Not at all!

Normal scroll:

<marquee>CONTENT HERE</marquee>

“Bouncy” (Going Back & Forth):

<marquee behavior="alternate">CONTENT HERE</marquee>

Marquee directions:

<marquee direction="LEFT, RIGHT, UP OR DOWN">CONTENT HERE</marquee>

Sliding Marquee

(Will Stop at the End):

<marquee behavior="slide">CONTENT HERE</marquee>

Marquee That Will Stop On Hover:

<marquee onmouseover="this.stop();" onmouseout="this.start();">CONTENT HERE</marquee>

Marquee Speed:

<marquee scrollamount="SPEED #">CONTENT HERE</marquee>

For Marquee Speed, The higher the Number, the faster the scroll. 

Hoped this helped!