Duplicate "background"

Hey there!
I’ve made a gradient background image (background.gif) for html use, with the following size (width: 2 height: 1500) - the thing is, that I would like to translate the following html code into flash:

<body background="background.gif">

Which means, that I need to know how to duplicate (using AS) the background MC (background.gif converted to MC) let’s say 50 times, starting with the first MC with a x value of 0, second MC with a x value of 2… and so on!
Hope you got the idea, else take a look at the attached .fla to see what I’m thinking of…

Any help would be nice!