SCREEN_SIZE = (1024, 704)
# Frame per second
-FPS = 60
+FPS = 30
-# Night length in ticks
-NIGHT_LENGTH = 3000
+# Night length in ticks and hours
+NIGHT_LENGTH = 1500
+NIGHT_LENGTH_HOURS = 12
+NIGHT_HOURS_PER_TICK = float(NIGHT_LENGTH_HOURS) / NIGHT_LENGTH
# Pymunk categories
OBSTACLE_CATEGORY = 1 << 0