stop button for auto scrolling done

app.py

@@ -40,16 +40,19 @@ if 'is_initialized' not in st.session_state:
         progress_percentage = (index) / (page_count - 1)
         read_pdf_progress_bar.progress(progress_percentage)
     st.session_state.img_index = 0
+    st.session_state.stop_button_clicked=False
 
 #if 'img_index' not in st.session_state:
 
-
+if st.button("Stop"):
+    st.session_state.stop_button_clicked = True
 st.write(str(st.session_state.img_index+1) +"/" + str(len(st.session_state.color_image_list)))
 st.image(st.session_state.gray_image_np_list[st.session_state.img_index], use_column_width=True)
-if st.session_state.img_index < len(st.session_state.color_image_list) - 1:
-    st.session_state.img_index += 1
-    time.sleep(3)
-    st.rerun()
+if not st.session_state.stop_button_clicked:
+    if st.session_state.img_index < len(st.session_state.color_image_list) - 1:
+        st.session_state.img_index += 1
+        time.sleep(3)
+        st.rerun()
 # col1, col2 = st.columns(2)
 # with col1:
 #     if st.button("Previous"):