--- a
+++ b/script_check_folder_exist.m
@@ -0,0 +1,16 @@
+%   A Compressed file called "Load_these_folders.zip" is added to the 
+%   files. It contain three main files 'envelop helpers', 'helpers' and 
+%   'PolarRectangularCon0'. Unzip Load_these_folders and put the above-mentioned
+%   files in the current folder(pwd).
+if ~isfolder('helpers') || ~isfolder('envelope helpers') || ~isfolder('PolarRectangularConv0')
+    if isfile('Load_these_folders.zip')
+        unzip('Load_these_folders.zip');
+        No_folder_flag = false;
+    else
+        No_folder_flag = true;
+    end
+else
+    No_folder_flag = false;
+end
+
+  
\ No newline at end of file