diff --git a/scripts/buld.py b/scripts/buld.py
index 4362b3c..8586fdd 100644
--- a/scripts/buld.py
+++ b/scripts/buld.py
@@ -3,6 +3,7 @@ import os
 import re
 
 import settings
+import instruments
 
 # print("all projects:")
 # print(settings.all_projects)
diff --git a/scripts/instruments.py b/scripts/instruments.py
new file mode 100644
index 0000000..4ed1ad5
--- /dev/null
+++ b/scripts/instruments.py
@@ -0,0 +1,18 @@
+import shutil
+import os
+
+def CreateOrRestoreFromBackup(base_dir, relative_path_to_files):
+	
+	for rel_path in relative_path_to_files:
+
+		abs_path = os.path.join(base_dir, rel_path)
+		abs_path_backup = "{0}.build_backup".format(os.path)
+		
+		if os.path.exists(abs_path_backup):
+			# restore from backup
+			shutil.copyfile(abs_path_backup, abs_path)
+		else:
+			# create backup
+			shutil.copyfile(abs_path, abs_path_backup)
+
+	return None