private void rectClick(object sender, MouseButtonEventArgs e)
        {

            // If game is paused, prevent action
            if (pause == true)
            {
                return;
            }

            // This variable contains the object that was clicked on
            var mouseWasDownOn = e.Source as FrameworkElement;
            // This hides the rectangle, revealing the image
            mouseWasDownOn.Visibility = Visibility.Hidden;
            MessageBox.Show("");


            // If an image is already revealed
            // This happens if no picture has been clicked
            if (firstImage == null)
            {
                firstImage = e.Source as FrameworkElement;
            }
            // This happens if an image is open
            else
            {
                secondImage = e.Source as FrameworkElement;
                samePicture = comparePicture(firstImage, secondImage);
                // If you clicked on same pictures
                if (samePicture)
                {
                    points = points + 1;
                    // Checks when the game is over
                    if (points > 7)
                    {
                        MessageBox.Show("You've won! ");
                        var currentValue = DateTime.Now - this.TimerStart;
                        int x = (int)currentValue.Seconds;
                        MessageBox.Show("You took " + x + " seconds to finish the game!");

                        HighScore score = new HighScore() { Score = points, Name = nameBox.Text };
                        highScore.Add(score);
                        MessageBox.Show("Feel free to retry the game if you want! ");



                    }

                }
                else {
                   if (difficulty == 1)
                    {
                        mouseWasDownOn.Visibility = Visibility.Hidden;

                        Thread.Sleep(2000);
                    }
                    else if (difficulty == 2)
                    {
                        mouseWasDownOn.Visibility = Visibility.Hidden;

                        Thread.Sleep(1000);

                    }
                    else if (difficulty == 3)
                    {
                        mouseWasDownOn.Visibility = Visibility.Hidden;

                        Thread.Sleep(200);

                    }

                    firstImage.Visibility = Visibility.Visible;
                    secondImage.Visibility = Visibility.Visible;

                }


                firstImage = null;
                secondImage = null;

            }