diff --git a/Programm/main.py b/Programm/main.py
index 1fcab43..b62db58 100644
--- a/Programm/main.py
+++ b/Programm/main.py
@@ -12,21 +12,46 @@ from PIL import Image
 mainColor = "#C03F49"
 contrastColor = "#8F2F3E"
 
-app = CTk()
-height= app.winfo_screenheight()
-scale = height/720
-downSized = 0.8
-app.geometry("%dx%d" % (height*16/9*downSized, height*downSized))
-app.configure(bg_color="White",fg_color="White")
-
 set_appearance_mode("light")
-set_widget_scaling(scale*downSized)
 
-
-class Sidebar():
-    def __init__(self):
+class Window_Settings(CTkToplevel):
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, **kwargs)
         
-        self.sidebar_frame = CTkFrame(master=app, fg_color=mainColor,  width=176, corner_radius=10,bg_color="White")
+        self.downSized = 0.5
+        self.geometry("%dx%d" % (self.master.height*16/9*self.downSized, self.master.height*self.downSized))
+        self.title("Einstellungen")
+        
+        self.frame_appearance = CTkFrame(master=self)
+        self.frame_appearance.pack(expand=True)
+        
+        self.label = CTkLabel(self.frame_appearance, text="Erscheinung")
+        self.label.pack(padx=5, pady=5)
+        
+        self.img_appearance = CTkImage(dark_image=Image.open("img/icons/moon_black.png"), light_image=Image.open("img/icons/sun_white.png"))
+        self.button_appearance = CTkButton(master=self.frame_appearance, image=self.img_appearance, text="Hell", text_color =("White","Black"),fg_color=("Black","White"), font=("Arial Bold", 14), hover_color=("#1A1A1A","#E6E6E6"), anchor="w",command=self.toggleAppearance)
+        self.button_appearance.pack(padx=5, pady=5)
+
+    def toggleAppearance(self):
+        if(self.button_appearance.cget("text")=="Dunkel"):
+            self.button_appearance.configure(text="Hell")
+            set_appearance_mode("light")
+        else:
+            self.button_appearance.configure(text="Dunkel")
+            set_appearance_mode("dark")
+
+class Main_Window(CTk):
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+        
+        self.title("Bundesjugendspiele-GUI")
+        self.height= self.winfo_screenheight()
+        self.scale = self.height/720
+        self.downSized = 0.8
+        self.geometry("%dx%d" % (self.height*16/9*self.downSized, self.height*self.downSized))
+        set_widget_scaling(self.scale*self.downSized)
+        
+        self.sidebar_frame = CTkFrame(master=self, fg_color=mainColor,  width=176, corner_radius=10,bg_color="White")
         self.sidebar_frame.pack(fill=Y,side=LEFT,anchor="w",padx=5, pady=5)
         
 
@@ -52,9 +77,17 @@ class Sidebar():
         self.button4.pack(padx=5, pady=5)
         
         self.img_settings = CTkImage(dark_image=Image.open("img/icons/settings_white.png"), light_image=Image.open("img/icons/settings_white.png"))
-        self.button5 = CTkButton(master=self.sidebar_frame, image=self.img_settings, text="Einstellungen", fg_color="transparent", font=("Arial Bold", 14), hover_color=contrastColor, anchor="w")
+        self.button5 = CTkButton(master=self.sidebar_frame, image=self.img_settings, text="Einstellungen", fg_color="transparent", font=("Arial Bold", 14), hover_color=contrastColor, anchor="w", command=self.open_window_settings)
         self.button5.pack(padx=10, pady=10,side=BOTTOM)
+        
+        self.window_settings = None
+        
+    def open_window_settings(self):
+        if self.window_settings is None or not self.window_settings.winfo_exists():
+            self.window_settings = Window_Settings(self)  # create window if its None or destroyed
+        else:
+            self.window_settings.focus()  # if window exists focus it
     
-s = Sidebar()
+app = Main_Window()
 
 app.mainloop()