Adding in pygame, and getting a window to display/close

main.py

@@ -0,0 +1,22 @@
+# this allows us to use code from
+# the open-source pygame library
+# throughout this file
+import pygame
+from constants import *
+
+def main():
+    pygame.init()
+    print("Starting asteroids!")
+    print(f"Screen width: {SCREEN_WIDTH}")
+    print(f"Screen height: {SCREEN_HEIGHT}")
+    screen = pygame.display.set_mode((SCREEN_WIDTH, SCREEN_HEIGHT))
+
+    while True:
+        for event in pygame.event.get():
+            if event.type == pygame.QUIT:
+                return
+        pygame.Surface.fill(screen, (0, 0, 0))
+        pygame.display.flip()
+
+if __name__ == "__main__":
+    main()