fizzbuzz with bug

fizzbuzz.js

var upperBand = 20;
var lowerBand = 1;

function fizzBuzz() {
	var result = "";
	for (var repetition = lowerBand; repetition <= 20; repetition++) {
		if (repetition % 3 === 0 && repetition === 0)
			result += "FizzBuzz ";
		else if (repetition % 3 === 0)
			result += "Fizz ";
		else if (repetition % 5 === 0)
			result += "Buzz ";
		else
			result += repetition + " ";
	}
	return result.trim();
}

fizzBuzz();