public Random rand = new Random();
        public Pen pioro;
        public List<kulka> kulki = new List<kulka>();
        public Form1()
        {
            InitializeComponent();
        }

        public Color getrandkolor()
        {
            return Color.FromArgb((byte)rand.Next(0, 255), (byte)rand.Next(0, 255), (byte)rand.Next(0, 255));
        }

        public Pen randompen()
        {
            return pioro = new Pen(getrandkolor(),5);
        }