Change Mouse Trail text color?

http://www.kirupa.com/developer/mx/mousetrailer.htm
from here i understand the action script. i want to change the text color so i did this:
Text = “welcome to darkside”;
letters = Text.split("");
letterformat = new TextFormat();
letterformat.font = “Verdana”;
letterformat.align = “center”;
letterformat.size = “10”;
letterformat.color= “white”( here i added this action so i can change the color do i need to include the code for white color? or just teh name iv tried both ways the text color stays teh same! and ideas?
and then all of this after it:
spacing = 8;
speed = 3;
for (var LTR = 0; LTR<letters.length; LTR++) {
mc = _root.createEmptyMovieClip(LTR+“l”, LTR);
mc.createTextField(letters[LTR]+“t”, LTR, LTR*spacing, 10, 20, 20);
with (mc[letters[LTR]+“t”]) {
text = letters[LTR];
setTextFormat(letterformat);
selectable = false;
}
if (LTR) {
mc.prevClip = _root[(LTR-1)+“l”];
mc.onEnterFrame = function() {
this._x += (this.prevClip._x-this._x+5)/speed;
this._y += (this.prevClip._y-this._y)/speed;
};
} else {
mc.onEnterFrame = function() {
this._x += (_root._xmouse-this._x+10)/speed;
this._y += (_root._ymouse-this._y)/speed;
};
}
}