Update app.py

app.py

@@ -88,8 +88,9 @@ if user_image_object is not None:
   
   '''Show some demos: '''
   
-  for ii in img_array[::11]:
-    st.image( img_array[ii] )
+  if len(img_array) > 7:
+    for ii in [1, 4, 7]:
+      st.image( img_array[ii] )