private void InitializePanels()
        {
            setHistory();

            ChooseAvatar chooseAvatarPanel = new ChooseAvatar(this);
            chooseAvatarPanel.TopLevel = false;
            pnlAvatarChoose.Controls.Add(chooseAvatarPanel);
            chooseAvatarPanel.FormBorderStyle = System.Windows.Forms.FormBorderStyle.None;
            chooseAvatarPanel.Dock = DockStyle.Fill;
            chooseAvatarPanel.Show();

            Options optionPanel = new Options(this);
            optionPanel.TopLevel = false;
            pnlOptions.Controls.Add(optionPanel);
            optionPanel.FormBorderStyle = System.Windows.Forms.FormBorderStyle.None;
            optionPanel.Dock = DockStyle.Fill;
            optionPanel.Show();

            ChooseClass chooseClass = new ChooseClass(this);
            chooseClass.TopLevel = false;
            pnlChooseClass.Controls.Add(chooseClass);
            chooseClass.FormBorderStyle = System.Windows.Forms.FormBorderStyle.None;
            chooseClass.Dock = DockStyle.Fill;
            chooseClass.Show();

            Ranking ranking = new Ranking(this);
            ranking.TopLevel = false;
            pnlRanking.Controls.Add(ranking);
            ranking.FormBorderStyle = System.Windows.Forms.FormBorderStyle.None;
            ranking.Dock = DockStyle.Fill;
            ranking.Show();
        }