diff --git a/square.py b/square.py
index ccf4ef6..6439492 100644
--- a/square.py
+++ b/square.py
@@ -25,7 +25,7 @@ class Square:
             6 7 8
         """
 
-        grids = [
+        grid_mappings = [
             (0, 0),  # grid 0
             (0, 1),  # grid 1
             (0, 2),  # grid 2
@@ -40,7 +40,7 @@ class Square:
         grid_coordinates = (self.line // 3, self.column // 3)
 
         grid_number = 0
-        while grids[grid_number] != grid_coordinates:
+        while grid_mappings[grid_number] != grid_coordinates:
             grid_number += 1
 
             if grid_number == 9: