public void run(){
        try{
            boolean done = false;
            while(!done){
                done = true;
                for(int y = 0 ; y < 9; y++){
                    System.out.println("");
                    for(int x = 0; x < 9; x++){ 
                        String value = this.field[y][x].toString();
                        if (value.equals("")){
                            value = " ";
                            done = false;
                        }
                        System.out.print(value);
                    }
                }
                System.out.println();
                this.sleep(1000);
            }
            
        }
        catch (InterruptedException e){
            System.out.println(e.toString());
        }
    }