First Example

function main() {
    clear();
    var myString = "this";

    append("Use append(); to add text to the story field. \n\n Add vars to the text like "+myString+".");
    addChoice("Use addChoice(); to add choices.", next);
}

function next() {
    clear();
    addChoice("Get a random integer.", function () {
        var myRandomInt = rndInt(0, 21);
        append("\n"+myRandomInt);
    });
    addChoice("Leave.", modExit);
}

main();