How can I alternate character colors with code CS3 JS-need for eye excersize?!

Question

For an interesting attempt to train eye focusing, I need to write code or find a tip to color every other character in any given file.
Still an amatuer in Scripting.
ST

Answer 1

Select a text frame and run the script. Don't choose a frame with great number of characters if you don't want to wait until tomorrow morning.
var myDocument = app.activeDocument;
var myColorCounter = 0;
var myColors = [];
var myColorsValues  = [
                      [100, 0, 0, 0],
                      [80, 0, 100, 0],
                      [0, 0, 100, 0],
                      [100, 60, 0, 0],
                      [0, 100, 100, 0],
                      [60, 100, 0, 0],
                      [0, 44, 96, 0]
CheckSwatches();
// Select a text frame
var myTextFrame = myDocument.selection[0];
var myCharacters = myTextFrame.characters;
for (i = 0; i < myCharacters.length; i++) {
    myCharacters[i].fillColor = myColors[myColorCounter]
    ResetSwatches();
ResetSwatches();
function CheckSwatches() {
    for (i=0; i<myColorsValues.length; i++)  {
        var myCurArray = myColorsValues[i];
        var myColorName = "C=" + myCurArray[0] + " M=" + myCurArray[1] +  " Y=" + myCurArray[2] + " K=" + myCurArray[3];
        if (myDocument.swatches.item(myColorName) == null){
            var myCurColor = myDocument.colors.add({colorValue:myCurArray, name:myColorName});
            myColors.push(myCurColor);
        else {
            myColors.push(myDocument.colors.item(myColorName));
function ResetSwatches() {
    if (myColorCounter < myColorsValues.length-1) {
        myColorCounter++;
    else {
        myColorCounter = 0;