Dynamic scrolling marquee (text)

i will be creating other effects and interactivity but what i want to have is a scrolling marquee like the windows screen saver … just a line of text that goes from one side of the screen to the other and then as it exits the screen it starts over again.

simple enough, i think

but i want to be able to specify a string or a sentence as a variable and then have a script create each letter as a new symbol so that i can apply action script to the individual symbols

so in the end movie the sentence that scrolls across the screen is made up of dynamically generated symbols that are taken from the variable that is the sentence:bu: