diff --git a/main.py b/main.py
index 052c61b..9606992 100644
--- a/main.py
+++ b/main.py
@@ -3,15 +3,6 @@ import os
 import streamlit as st
 from loguru import logger
 
-from app.core import settings
-
-pages = os.listdir(os.path.join(settings.BASE_DIR, 'pages'))
-pages = [{
-    'filename': page,
-    'filepath': os.path.join(settings.BASE_DIR, 'pages', page)
-} for page in pages if page.endswith('.py') and page != '__init__.py']
-pages.sort(key=lambda x: x['filename'])
-
 st.set_page_config(
     page_title="Leo's Cool App",
     page_icon="🧊",
@@ -20,6 +11,21 @@ st.set_page_config(
 )
 
 
+@st.cache_resource
+def get_settings():
+    from app.core import settings
+    return settings
+
+
+settings = get_settings()
+pages = os.listdir(os.path.join(settings.BASE_DIR, 'pages'))
+pages = [{
+    'filename': page,
+    'filepath': os.path.join(settings.BASE_DIR, 'pages', page)
+} for page in pages if page.endswith('.py') and page != '__init__.py']
+pages.sort(key=lambda x: x['filename'])
+
+
 def open_selected_file():
     with open(st.session_state.page_file['filepath'], 'r', encoding='utf-8') as f:
         st.session_state.file_content = f.read().strip()
@@ -30,6 +36,7 @@ def save_file_content():
     with open(st.session_state.page_file['filepath'], 'w', encoding='utf-8') as f:
         logger.debug(f"save: <\n{st.session_state.file_content}\n>to file {st.session_state.page_file['filepath']}")
         f.write(st.session_state.file_content)
+        st.toast('保存成功!', icon='🎉')
 
 
 def new_file():
diff --git a/pages/first_demo.py b/pages/first_demo.py
new file mode 100644
index 0000000..b3b9ba1
--- /dev/null
+++ b/pages/first_demo.py
@@ -0,0 +1,10 @@
+#!/usr/bin/env python3
+# -*- coding:utf-8 -*-
+import streamlit as st
+
+st.write('# Hello World!')
+
+st.link_button("Go to gallery", "https://streamlit.io/gallery")
+
+for i in range(5):
+    st.write(f"{i + 1}. this is line {i + 1}")
diff --git a/pages/test.py b/pages/test.py
deleted file mode 100644
index 395d8a1..0000000
--- a/pages/test.py
+++ /dev/null
@@ -1,8 +0,0 @@
-#!/usr/bin/env python3
-# -*- coding:utf-8 -*-
-import streamlit as st
-
-st.write('Hello World!')
-
-for i in range(1, 13):
-    st.write(f"{i}. this is line {i}")