diff --git a/degeon_py/main.py b/degeon_py/main.py
index f35dda3..dc17845 100644
--- a/degeon_py/main.py
+++ b/degeon_py/main.py
@@ -46,7 +46,7 @@ class ChatSelector:
     hovered_chat: typing.Optional[int] = None
     width: int = WIDTH // 3
     height: int = HEIGHT
-    chat_height: int = HEIGHT // 10
+    chat_height: int = HEIGHT // 4
 
     def render(self) -> pygame.Surface:
         """
@@ -68,7 +68,7 @@ class ChatSelector:
     def process_event(self, event: pygame.event.Event):
         """
         Process a click: select the necessary chat if this click is in the widget
-        :param event: pygame event
+        :param event: a pygame event
         """
         if event.type == pygame.MOUSEBUTTONUP and event.pos[0] < self.width:
             self.active_chat = event.pos[1] // self.chat_height
@@ -93,8 +93,29 @@ class ActiveChat:
     Attributes:
         :param chat (dc.Chat): the chat (Rust Chat type)
     """
-
     chat: 'dc.Chat'
+    height: int = HEIGHT
+    width: int = 3 * (WIDTH // 4)
+
+    @classmethod
+    def new(cls, chat: 'dc.Chat', **kwargs) -> ActiveChat:
+        return cls(chat=chat, **kwargs)
+
+    def render(self) -> pygame.Surface:
+        """
+        Creates a pygame surface and draws the chat on it
+        :return: the surface with the chat on it
+        """
+        surface: pygame.Surface = pygame.Surface((self.width, self.height))
+
+        return surface
+
+    def process_event(self, event: pygame.event.Event):
+        """
+        Process a click: select the necessary chat if this click is in the widget
+        :param event: a pygame event
+        """
+        pass  # todo
 
 
 @dataclass
@@ -106,8 +127,11 @@ class Degeon:
     """
     core: 'dc.Degeon'
     chat_selector: ChatSelector
+    active_chat: typing.Optional[ActiveChat] = None
     has_profile_popup_opened: bool = False
     has_no_peers_popup: bool = False
+    clock: pygame.time.Clock = field(default_factory=pygame.time.Clock)
+    fps: int = FPS
 
     @classmethod
     def new(cls) -> Degeon:
@@ -115,7 +139,9 @@ class Degeon:
         Create a new default instance with settings from file
         :return: a Degeon instance
         """
-        pass   # todo
+        core: dc.Degeon = dc.new_degeon()
+        chat_selector = ChatSelector()
+        return cls(core=core, chat_selector=chat_selector)
 
     def render(self, screen: pygame.Surface):
         """
@@ -125,8 +151,45 @@ class Degeon:
         chats_surface = self.chat_selector.render()
         screen.blit(chats_surface, (0, 0))
 
+    def process_core_messages(self):
+        """
+        Do all the necessary Rust work
+        """
+        pass   # todo
+
     def tick(self):
         """
         Handle incoming messages, update chats, create no_peers popup if necessary
         """
-        pass   # todo
+        # process events in core
+        self.process_core_messages()
+        self.chat_selector.chats = self.core.chats
+        if self.chat_selector.active_chat < len(self.chat_selector.chats):
+            self.active_chat = ActiveChat.new(self.chat_selector.chats[self.chat_selector.active_chat])
+
+    def process_event(self, event: pygame.event.Event):
+        """
+        Process an event
+        :param event: pygame event
+        """
+        self.chat_selector.process_event(event)
+
+    def main_loop(self, screen: pygame.Surface):
+        """
+        Drawing everything and handling events
+        """
+        while True:
+            self.clock.tick(self.fps)
+            for event in pygame.event.get():
+                if event.type == pygame.QUIT:
+                    return
+                self.process_event(event)
+            self.tick()
+            self.render(screen)
+            pygame.display.update()
+
+
+deg = Degeon.new()
+screen = pygame.display.set_mode((WIDTH, HEIGHT))
+deg.main_loop(screen)
+pygame.quit()