diff --git a/Chapter_12/blue_sky.py b/Chapter_12/blue_sky.py
new file mode 100644
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--- /dev/null
+++ b/Chapter_12/blue_sky.py
@@ -0,0 +1,37 @@
+# Exercise 12-1 Blue Sky
+# Learning Objective: Create a gui with a blue background using pygame module.
+
+import pygame 
+import sys
+
+class Game:
+    def __init__(self):
+        """Initialize game and create resources"""
+        pygame.init()
+        self.clock = pygame.time.Clock()
+        self.screen = pygame.display.set_mode((1024, 768))
+        pygame.display.set_caption("Blue Sky")
+
+    def run_game(self):
+        """Start main game loop"""
+        while True:
+            #Listen for events
+            self._check_events()
+            self._update_screen()
+            self.clock.tick(60)
+
+    def _check_events(self):
+        """Respond to keypresses and mouse events"""
+        for event in pygame.event.get():
+                if event.type == pygame.QUIT:
+                    sys.exit()
+    
+    def _update_screen(self):
+        self.screen.fill((135, 193, 255))     
+        # refresh display
+        pygame.display.flip()
+
+if __name__ == '__main__':
+    # Create game instance and run game
+    bluesky = Game()
+    bluesky.run_game()