ChangingColorsApp.ChangingColorsApp.Tick C# (CSharp) Method

        public override void Tick()
        {
            foreach (var c in CubeSet)
              {
              var num = c.Neighbors.Count;
              switch (num)
              {
                  case 0:
                      c.FillScreen(Color.Black);
                      if (_fourSound != null && !_fourSound.IsPaused)
                      {
                          _fourSound.Pause();
                      }
                      break;
                  case 1:
                      c.FillScreen(new Color(255, 0, 0)); // red
                      break;
                  case 2:
                      c.FillScreen(new Color(255, 255, 0)); // yellow
                      break;
                  case 3:
                      c.FillScreen(new Color(0, 0, 255)); // blue
                      break;
                  case 4:
                      c.FillScreen(new Color(0, 255, 0)); // green
                      if (_fourSound == null)
                      {
                          _fourSound = Sounds.CreateSound("scoobydoo.mp3");
                          _fourSound.Play((float) 0.75);
                      } else if (_fourSound.IsPaused)
                      {
                          _fourSound.Resume();
                      }
                      break;
              }
              var rand = new Random();
              c.FillRect(new Color(rand.Next(256), rand.Next(256), rand.Next(256)), 50, 50, 50, 50);
              c.Paint();
              }
        }