diff --git a/main.py b/main.py
index 5ec51d6..9e7d0b1 100644
--- a/main.py
+++ b/main.py
@@ -8,7 +8,7 @@ import event_interpreter
 
 
 
-if __name__ == "__main__":
+def main():
 
 
     pygame.init()
@@ -62,3 +62,6 @@ if __name__ == "__main__":
                 running = False
 
             else: event_interpreter.interpret( event )
+
+if __name__ == "__main__":
+    main()
diff --git a/project_constants.py b/project_constants.py
index c2af97c..14ef04e 100644
--- a/project_constants.py
+++ b/project_constants.py
@@ -17,6 +17,8 @@ V_NAME_OF_WINDOW = "MineFusion TM"
 V_TILE_SIZE = 60
 V_GRID_VER_TILES = V_GRID_HOR_TILES = 10        # vertical, horizontal
 V_SCREEN_PADDING = 10
+V_MINEFIELD_HEIGHT = V_TILE_SIZE * V_GRID_VER_TILES
+V_MINEFIELD_WIDTH = V_TILE_SIZE * V_GRID_HOR_TILES
 
 SCREEN = pygame.display.set_mode\
 (
@@ -35,77 +37,77 @@ SCREEN = pygame.display.set_mode\
 ASSET_BACKGROUND = pygame.transform.scale\
 (
     pygame.image.load('resources/assets/new_grid.png'),
-    ( 600, 600 )
+    (V_MINEFIELD_WIDTH, V_MINEFIELD_WIDTH)
 )
 
 ASSET_SAPPER = pygame.transform.scale\
 (
     pygame.image.load( 'resources/assets/sapper.png' ),
-    ( 60, 60 )
+    (V_TILE_SIZE, V_TILE_SIZE)
 )
 
 ASSET_MINE_A = pygame.transform.scale\
 (
     pygame.image.load( 'resources/assets/mine_a.png' ),
-    ( 60, 60 )
+    (V_TILE_SIZE, V_TILE_SIZE)
 )
 
 ASSET_MINE_B = pygame.transform.scale\
 (
     pygame.image.load( 'resources/assets/mine_b.png' ),
-    ( 60, 60 )
+    (V_TILE_SIZE, V_TILE_SIZE)
 )
 
 ASSET_MINE_F = pygame.transform.scale\
 (
     pygame.image.load( 'resources/assets/mine_f.png' ),
-    ( 60, 60 )
+    (V_TILE_SIZE, V_TILE_SIZE)
 )
 
 ASSET_MINE_K = pygame.transform.scale\
 (
     pygame.image.load( 'resources/assets/mine_k.png' ),
-    ( 60, 60 )
+    (V_TILE_SIZE, V_TILE_SIZE)
 )
 
 ASSET_TILE_ORANGE = pygame.transform.scale\
 (
     pygame.image.load( 'resources/assets/tile_orange.png' ),
-    ( 60, 60 )
+    (V_TILE_SIZE, V_TILE_SIZE)
 )
 
 ASSET_TILE_RED = pygame.transform.scale\
 (
     pygame.image.load( 'resources/assets/tile_red.png' ),
-    ( 60, 60 )
+    (V_TILE_SIZE, V_TILE_SIZE)
 )
 
 ASSET_TILE_BLUE = pygame.transform.scale\
 (
     pygame.image.load( 'resources/assets/tile_blue.png' ),
-    ( 60, 60 )
+    (V_TILE_SIZE, V_TILE_SIZE)
 )
 
 ASSET_TILE_PURPLE = pygame.transform.scale\
 (
     pygame.image.load( 'resources/assets/tile_purple.png' ),
-    ( 60, 60 )
+    (V_TILE_SIZE, V_TILE_SIZE)
 )
 
 ASSET_TILE_GREEN = pygame.transform.scale\
 (
     pygame.image.load( 'resources/assets/tile_green.png' ),
-    ( 60, 60 )
+    (V_TILE_SIZE, V_TILE_SIZE)
 )
 
 ASSET_TILE_YELLOW = pygame.transform.scale\
 (
     pygame.image.load( 'resources/assets/tile_yellow.png' ),
-    ( 60, 60 )
+    (V_TILE_SIZE, V_TILE_SIZE)
 )
 
 ASSET_TILE_WHITE = pygame.transform.scale\
 (
     pygame.image.load( 'resources/assets/tile_white.png' ),
-    ( 60, 60 )
+    (V_TILE_SIZE, V_TILE_SIZE)
 )
\ No newline at end of file