Adding new code and ship image

alien_invasion.py

@@ -2,14 +2,17 @@ import sys
 
 import pygame
 
+from settings import Settings
+
 class AlienInvasion:
     """Overall class to manage game assets and behaviour."""
 
     def __init__(self):
         """Intialize the game, and create game resources"""
         pygame.init()
+        self.settings = Settings()
 
-        self.screen = pygame.display.set_mode((1200, 800))
+        self.screen = pygame.display.set_mode((self.settings.screen_witdh, self.settings.screen_heigh))
         pygame.display.set.caption("Alien Invasion")
 
         # Set the background color.
@@ -24,7 +27,7 @@ class AlienInvasion:
                     sys.exit()
 
             # Redraw the screen during each  pass through the loop.
-            self.screen.fill(self.bg_color)
+            self.screen.fill(self.settings.bg_color)
 
             # Make the most recently drawn screen visible.
             pygame.display.flip()