function sequence(startCount, newCount) {

  var currentCount = startCount;

  return function counter() {

      currentCount += newCount;

      return currentCount;

  };

}

​

function take(gen, x) {

  var mas = [];

  for (var i = 0; i < x; i++) {

    mas.push(gen());

  }

  return mas;

}

​

var square = function(number) {

  return number * number;

};

​

var counter = sequence(1, 3);

​

//console.log(counter());

//console.log(counter());

​

//var gen = take(counter, 5);

​

//console.log(gen);

​

//console.log(gen.map(square));

​

function fmap(square, counter) {

  return function () {

    var res = square(counter());

    return res;

  };

}

​

var squareCounter = fmap(square, counter);

​

console.log(squareCounter());

console.log(squareCounter());