initTyper();
function initTyper() {
    //Determine text to be animated and store in a new String object.
    textString = new String("MATT:");
    // Determine the length of the text in characters.
    charNum = textString.length + 1;
    // Declare a variable to count through the characters.
    theChar = 0;
    // Declare an array to contain each character.
    words = new Array();
    // Loop through every character and store character sequences into the array.
    for (i=0; i <= charNum; i++) {
        words[i] = textString.substring(0,i);
    }
    // Determine speed of text animation in milliseconds.
    typeRate = 10;
    //Establish the interval to call doTyper and animate the text sequences.
    typerLoop = setInterval(doTyper,typeRate);
}
//
function doTyper() {
    // Compare the character counter against the total number of characters.
    if (theChar == charNum) {
        // Kill the function interval that's animating the text.
        clearInterval(typerLoop);
    } else {
        // Pass current array position value to the dynamic text field on the stage.
        ex_talk_box2.textContent.text = words[theChar];
        // Update the graphics on the stage.
        updateAfterEvent();
        // Increment the character count.
        theChar++;
    }
}