Marquee Alternate Behavior, Cant get it to work with new code Options

[DarkMouth]

So yeah
in myspace BlueMouth my movies section i struggle for a while to get it to the size i wanted
when i finally did i had to use another code
i realized that my marquee alternate behavior was gone
and before the alternate behavior was there, but it wasnt the right width. you could only see like half of a movie poster at a time.

The old code was
<marquee behavior="alternate"><marquee width="75%"> URL HERE </marquee></marquee>

the code im using now is
<marquee direction="left": height="500": width="300"> URL HERE </Marquee>

Now ive experimented with the first code and is just wont widen out like the second one, but the second code wont do the alternate behavior and ive experimented with it too

So yeah
if u could
HELP