diff --git a/Dockerfile b/Dockerfile
index 6f0763b..1724eb4 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -8,4 +8,4 @@ COPY . /app
 
 WORKDIR /app
 
-CMD ["streamlit", "run", "/app/main.py", "--server.port", "80", "--server.enableCORS", "false"]
\ No newline at end of file
+CMD ["/app/start.sh"]
\ No newline at end of file
diff --git a/main.py b/main.py
index 1684a94..cfa6933 100644
--- a/main.py
+++ b/main.py
@@ -5,9 +5,30 @@ 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'])
 
-def select_file():
-    ...
+st.set_page_config(
+    page_title="Leo's Cool App",
+    page_icon="🧊",
+    layout="wide",
+    initial_sidebar_state="expanded",
+)
+
+
+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()
+        st.session_state.file_lines = st.session_state.file_content.splitlines()
+
+
+def save_file_content():
+    with open(st.session_state.page_file['filepath'], 'w', encoding='utf-8') as f:
+        f.write(st.session_state.file_content)
 
 
 def new_file():
@@ -31,21 +52,35 @@ st.write('Hello World!')
 
 
 with st.sidebar:
-    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']
-
-    option = st.selectbox(
-        'How would you like to be contacted?',
+    st.selectbox(
+        '选择要配置的文件',
         pages,
         index=0,
         format_func=lambda x: x['filename'],
-        on_change=select_file,
+        on_change=open_selected_file,
         key='page_file'
     )
+    st.write('You selected:', st.session_state.page_file)
+    st.divider()
+    st.text_input('新建文件', on_change=new_file, key='new_file')
 
-    st.write('You selected:', option)
+if 'file_content' not in st.session_state:
+    open_selected_file()
 
-st.text_input('新建文件', on_change=new_file, key='new_file')
+st.write(f'# 当前文件: `{st.session_state.page_file["filename"]}`')
+col1, col2 = st.columns(2)
+
+with col1:
+    st.write('### 代码高亮展示')
+    st.code(st.session_state.file_content, line_numbers=True)
+
+with col2:
+    st.write('### 内容编辑区')
+    st.text_area(
+        key='file_content',
+        label_visibility='collapsed',
+        label='Text to analyze',
+        on_change=save_file_content,
+        value=st.session_state.file_content,
+        height=50 + 22 * len(st.session_state.file_lines),
+    )
diff --git a/pages/form.py b/pages/form.py
deleted file mode 100644
index 81a340f..0000000
--- a/pages/form.py
+++ /dev/null
@@ -1,47 +0,0 @@
-#!/usr/bin/env python3
-# -*- coding:utf-8 -*-
-import streamlit as st
-import pandas as pd
-import numpy as np
-
-
-def get_data():
-    df = pd.DataFrame({
-        "lat": np.random.randn(200) / 50 + 37.76,
-        "lon": np.random.randn(200) / 50 + -122.4,
-        "team": ['A', 'B'] * 100
-    })
-    return df
-
-
-if st.button('Generate new points'):
-    st.session_state.df = get_data()
-if 'df' not in st.session_state:
-    st.session_state.df = get_data()
-df = st.session_state.df
-
-with st.form("my_form"):
-    header = st.columns([1, 2, 2])
-    header[0].subheader('Color')
-    header[1].subheader('Opacity')
-    header[2].subheader('Size')
-
-    row1 = st.columns([1, 2, 2])
-    colorA = row1[0].color_picker('Team A', '#0000FF')
-    opacityA = row1[1].slider('A opacity', 20, 100, 50, label_visibility='hidden')
-    sizeA = row1[2].slider('A size', 50, 200, 100, step=10, label_visibility='hidden')
-
-    row2 = st.columns([1, 2, 2])
-    colorB = row2[0].color_picker('Team B', '#FF0000')
-    opacityB = row2[1].slider('B opacity', 20, 100, 50, label_visibility='hidden')
-    sizeB = row2[2].slider('B size', 50, 200, 100, step=10, label_visibility='hidden')
-
-    st.form_submit_button('Update map')
-
-alphaA = int(opacityA * 255 / 100)
-alphaB = int(opacityB * 255 / 100)
-
-df['color'] = np.where(df.team == 'A', colorA + f'{alphaA:02x}', colorB + f'{alphaB:02x}')
-df['size'] = np.where(df.team == 'A', sizeA, sizeB)
-
-st.map(df, size='size', color='color')
diff --git a/pages/test.py b/pages/test.py
new file mode 100644
index 0000000..395d8a1
--- /dev/null
+++ b/pages/test.py
@@ -0,0 +1,8 @@
+#!/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}")
diff --git a/pages/test2_input-output.py b/pages/test2_input-output.py
new file mode 100644
index 0000000..f5b4c62
--- /dev/null
+++ b/pages/test2_input-output.py
@@ -0,0 +1,31 @@
+import random
+
+import streamlit as st
+import pandas as pd
+import numpy as np
+
+if "counter" not in st.session_state:
+    st.session_state.counter = 0
+
+st.session_state.counter += 1
+
+st.header(f"This page has run {st.session_state.counter} times.")
+st.button("Run it again")
+
+if "df" not in st.session_state:
+    st.session_state.df = pd.DataFrame(np.random.randn(20, 2), columns=["x", "y"])
+if "color" not in st.session_state:
+    st.session_state.color = "#FF0000"
+
+
+def generate_random_color():
+    rand_color = "#{:06x}".format(random.randint(0, 0xFFFFFF))
+    st.session_state.color = rand_color.upper()
+
+
+st.header("Choose a datapoint color")
+st.color_picker("Color", "#FF0000", key="color")
+st.button("random color", key="random_color", on_click=generate_random_color)
+st.divider()
+
+st.scatter_chart(st.session_state.df, x="x", y="y", color=st.session_state.color)
diff --git a/requirements.txt b/requirements.txt
index 4883385..274b1e8 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,4 +2,6 @@ streamlit~=1.29.0
 loguru
 pydantic
 redis
-pydantic-settings
\ No newline at end of file
+pydantic-settings
+pandas
+numpy
\ No newline at end of file
diff --git a/start.bat b/start.bat
index b828833..bc87773 100644
--- a/start.bat
+++ b/start.bat
@@ -1 +1 @@
-streamlit run main.py
\ No newline at end of file
+streamlit run --server.port 5280 --server.enableCORS false ./main.py
\ No newline at end of file
diff --git a/start.sh b/start.sh
index b828833..b7638ed 100644
--- a/start.sh
+++ b/start.sh
@@ -1 +1,2 @@
-streamlit run main.py
\ No newline at end of file
+#!/usr/bin/env bash
+streamlit run --server.port 80 --server.enableCORS false ./main.py
\ No newline at end of file