diff --git a/app.py b/app.py
index 9a7440a..488d3d7 100644
--- a/app.py
+++ b/app.py
@@ -5,6 +5,14 @@ import cv2
 import time   
 from PIL import Image
 import numpy as np
+
+
+from tools.interact_tools import initialize
+
+
+initialize()
+
+
 def pause_video(play_state):
     print("user pause_video")
     play_state.append(time.time())
diff --git a/tools/__init__.py b/tools/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/tools/interact_tools.py b/tools/interact_tools.py
index 88c6580..997fcdf 100644
--- a/tools/interact_tools.py
+++ b/tools/interact_tools.py
@@ -7,10 +7,11 @@ from typing import Union
 from segment_anything import sam_model_registry, SamPredictor, SamAutomaticMaskGenerator
 import matplotlib.pyplot as plt
 import PIL
-from mask_painter import mask_painter as mask_painter2
+from tools.mask_painter import mask_painter as mask_painter2
 from base_segmenter import BaseSegmenter
 from painter import mask_painter, point_painter
-
+import os
+import requests
 
 mask_color = 3
 mask_alpha = 0.7
@@ -24,11 +25,30 @@ contour_color = 2
 contour_width = 5
 
 
+def download_checkpoint(url, folder, filename):
+    os.makedirs(folder, exist_ok=True)
+    filepath = os.path.join(folder, filename)
+
+    if not os.path.exists(filepath):
+        response = requests.get(url, stream=True)
+        with open(filepath, "wb") as f:
+            for chunk in response.iter_content(chunk_size=8192):
+                if chunk:
+                    f.write(chunk)
+
+    return filepath
+
+
 def initialize():
     '''
     initialize sam controler
     '''
-    SAM_checkpoint= '/ssd1/gaomingqi/checkpoints/sam_vit_h_4b8939.pth'
+    checkpoint_url = "https://dl.fbaipublicfiles.com/segment_anything/sam_vit_h_4b8939.pth"
+    folder = "segmenter"
+    SAM_checkpoint= './checkpoints/sam_vit_h_4b8939.pth'
+    download_checkpoint(checkpoint_url, folder, SAM_checkpoint)
+    
+
     model_type = 'vit_h'
     device = "cuda:0"
     sam_controler = BaseSegmenter(SAM_checkpoint, model_type, device)