Threaded FizzBuzz

public class Main {

    public static void main(String[] args) throws InterruptedException {
        number(1);
        number(2);
        word("Fizz");
        number(4);
        word("Buzz");
        word("Fizz");
        number(7);
        number(8);
        word("Fizz");
        word("Buzz");
        number(11);
        word("Fizz");
        number(13);
        number(14);
        word("Fizz Buzz");

    }

    public static void number(final int i) throws InterruptedException {
        Thread t = new Thread(new Runnable() {
            @Override
            public void run() {
                int x = i;
                while (true) {
                    System.out.println(x);
                    x += 15;
                    try {
                        Thread.sleep(15000);
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                }
            }
        });
        t.start();
        Thread.sleep(1000);
    }

    public static void word(final String s) throws InterruptedException {
        Thread t = new Thread(new Runnable() {
            @Override
            public void run() {

                while (true) {
                    System.out.println(s);
                    try {
                        Thread.sleep(15000);
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                }
            }
        });
        t.start();
        Thread.sleep(1000);
    }

}