TextFormat Object

I have a input text box that you type the answer into and hit a button that will check the anwser. If the answer is wrong the word wrong shows up in the text box. My question is how can I get the word “wrong” to show in red.
Here is the code I am using also I have attached the file.
submit_btn.onRelease = function() {
var W:Number = width_txt.text;
var H:Number = height_txt.text;
var A:Number = answer_txt.text;
if (A == (WH)) {
answer_txt.text = W
H;
} else {
[COLOR=red]myFormat = new TextFormat();
myFormat.color = 0xFF000;
answer_txt.text.setTextFormat(myFormat);[/COLOR]
answer_txt.text = “Wrong”;
}
};
clear_btn.onRelease = function() {
width_txt.text = “”;
height_txt.text = “”;
answer_txt.text = “”;
};