fix loading bar

Home.py

@@ -26,10 +26,9 @@ def app():
 
     file = st.file_uploader("Upload Files",type=['mp4','wav','mp3'])
 
-    progress_bar = st.progress(0)
-    status_text = st.empty()
-
     if file is not None:
+        progress_bar = st.progress(0)
+        status_text = st.empty()
         status_text.text('Uploading file...')
         progress_bar.progress(10)
         st.write(file.name)