Ridiculous Fibonacci Calculator

fibonacci.js

function fib (step) {
    
    fib.times = fib.times || 0;
    fib.times += step || 1;

    clearTimeout(fib.calculate);

    fib.calculate = setTimeout(function() {

        var first = 0,
            second = 1,
            total = 0;

        for(var i = 2; i <= fib.times; i++) {
	    total = first + second;
	    first = second;
	    second = total;
        }

        console.log("Fibonacci of %s : %s", fib.times, total);

        fib.times = 0;

    }, 0);

    return fib;
}

fib(2)(4)(6)(8); //=> Fibonacci of 20 : 6765