import java.util.Scanner;

public class Tradklokke {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        System.out.println("Trykk enter for aa starte...");
        scan.nextLine();

        Thread t1 = new Thread(new Stoppeklokke());
        t1.start();

        System.out.println("Trykk enter for aa avslutte...");
        scan.nextLine();
        t1.interrupt();
        System.out.println("Avsluttet");
        scan.close();
    }
}

class Stoppeklokke implements Runnable {
    public void run() {
        int counter = 0; 
        while(true) {
            try {
                Thread.sleep(1000);
                System.out.println(counter);
                counter++;
            } catch(InterruptedException e) {
                System.out.println("Interrupted!");
                return;
            }
        }
        
    }
}