Actionscript for a simple marquee?

say i wanted the astrix below to scroll from right to left:
[**********************************]
say one of them is one color and the other is another color
so it would create a marquee type effect,
and then i wanted this to loop infinitely without any spaces…
how would this be achieved in actionscript?

i know this may be really easy, but i’m new.
so please answer like you would a newbie. :s: