(function() {

    var sample = "sample1";

    (function() {

        // set sample variable
        sample = "sample2";

        (function() {

            // set sample variable
            sample = "sample3";
        }());
    }());



    console.log(sample); // "sample3"
}());

console.log(sample); // --> "sample1" ??

(function() {

    var sample = "sample1";

    (function() {

        // set sample variable
        var sample = "sample2";

        (function() {

            // set sample variable
           var sample = "sample3";
        }());
    }());

console.log(sample); // "sample1"
}());

var sample = "sample2";

var sample = "sample1";
sample = "sample2";
sample = "sample3";
console.log(sample);