private void moveStoneToCup(StoneObj s, CupObj oldC, CupObj newC)
        {
            Random rnd       = new Random();
            Point  oldCupLoc = oldC.Location;
            Point  newCupLoc = newC.Location;
            int    stoneX    = s.Location.X + (newCupLoc.X - oldCupLoc.X);
            int    stoneY    = s.Location.Y + (newCupLoc.Y - oldCupLoc.Y);
            int    randomInt = rnd.Next(0, 2);

            //if moving to a mancala cup,  Y should occasionally be incremented by more to put it in the bottom half
            if (randomInt == 1 && ((int)newC.Tag == 7 || (int)newC.Tag == 14))
            {
                stoneY += 80;
            }
            s.Location = new Point(stoneX, stoneY);
            s.Tag      = newC.Tag;
        }
        private void drawStoneInCup(StoneObj s, CupObj c, Random rnd)
        {
            int    stoneCol = rnd.Next(1, 6);
            Bitmap stoneImg;

            if (stoneCol == 1)
            {
                stoneImg = new Bitmap(MancalaGUI.Properties.Resources.rockBlue);
            }
            else if (stoneCol == 2)
            {
                stoneImg = new Bitmap(MancalaGUI.Properties.Resources.rockGreen);
            }
            else if (stoneCol == 3)
            {
                stoneImg = new Bitmap(MancalaGUI.Properties.Resources.rockPurple);
            }
            else if (stoneCol == 4)
            {
                stoneImg = new Bitmap(MancalaGUI.Properties.Resources.rockRed);
            }
            else
            {
                stoneImg = new Bitmap(MancalaGUI.Properties.Resources.rockYellow);
            }
            s.BackgroundImage       = stoneImg;
            s.BackgroundImageLayout = ImageLayout.Stretch;
            s.Enabled     = false;
            s.Visible     = true;
            s.Size        = new Size(35, 25);
            s.BackColor   = Color.Transparent;
            s.BorderStyle = BorderStyle.None;
            Point cupLoc  = c.Location;
            Size  cupSize = c.Size;
            int   stoneX  = rnd.Next(c.Location.X, c.Location.X + c.Width - s.Width);
            int   stoneY  = rnd.Next(c.Location.Y, c.Location.Y + c.Height - s.Height);

            s.Location = new Point(stoneX, stoneY);
        }