Adding in bullets

main.py

@@ -6,6 +6,7 @@ from constants import SCREEN_HEIGHT, SCREEN_WIDTH
 from player import Player
 from asteroid import Asteroid
 from asteroidfield import AsteroidField
+from shot import Shot
 
 def main():
     pygame.init()
@@ -16,9 +17,11 @@ def main():
     asteroids = pygame.sprite.Group()
     updatable = pygame.sprite.Group()
     drawable = pygame.sprite.Group()
+    shots = pygame.sprite.Group()
 
     Asteroid.containers = (asteroids, updatable, drawable)
     AsteroidField.containers = updatable
+    Shot.containers = (shots, updatable, drawable)
     asteroid_field = AsteroidField()
 
     Player.containers = (updatable, drawable)