diff --git a/basic_functions.py b/basic_functions.py
index 53d5158..416dabd 100644
--- a/basic_functions.py
+++ b/basic_functions.py
@@ -1,6 +1,16 @@
+"""
+basic_functions module
+A number of functionalities that help the project
+but cannot be a part of the PyQGIS tool.
+Project Developer: Alireza Adli alireza.adli@concordia.ca
+"""
+
 import os
 import glob
-import time
+import processing
+
+from qgis.core import QgsApplication
+from qgis.analysis import QgsNativeAlgorithms
 
 
 def find_shp_files(root_folder):
@@ -13,6 +23,16 @@ def find_shp_files(root_folder):
   return shp_files
 
 
+def find_las_files(root_folder):
+  las_files = []
+  # Sort folders alphabetically
+  for foldername, _, _ in sorted(os.walk(root_folder)):
+    for filename in sorted(glob.glob(os.path.join(foldername, '*.las'))):
+      new_file_name = filename.replace('\\', r'/')
+      las_files.append(new_file_name)
+  return las_files
+
+
 def create_folders(directory, num_folders):
   """
   Create a specified number of folders in the given directory.
@@ -41,4 +61,15 @@ def create_output_folders(paths_dict, output_dir):
     if path[-1] != 's':
       paths_dict[path] = output_path + f'/{new_folder}.shp'
     else:
-      paths_dict[path] = output_path
\ No newline at end of file
+      paths_dict[path] = output_path
+
+
+def merge_las_layers(layers_path, mergeded_layer_path):
+  merging_layers = find_las_files(layers_path)
+  QgsApplication.processingRegistry().addProvider(QgsNativeAlgorithms())
+
+  params = {'LAYERS': merging_layers,
+            'CRS': None,
+            'OUTPUT': mergeded_layer_path}
+
+  processing.run("native:mergevectorlayers", params)
\ No newline at end of file