code refactor

params.py

@@ -1,3 +1,4 @@
+import pygame
 from pygame.locals import HWSURFACE, DOUBLEBUF
 
 FLAGS =  HWSURFACE | DOUBLEBUF #| FULLSCREEN
@@ -5,7 +6,11 @@ FLAGS =  HWSURFACE | DOUBLEBUF #| FULLSCREEN
 GX = 1000
 GY = 1000
 CELL_COLOR = (80,80,80)
-CAR_SIZE=25
+CAR_SIZE=20
 VISION_LENGTH = 50
 VISION_SPAN = 25 # degrees
-THROTTLE_POWER = 3
+THROTTLE_POWER = 3
+
+pygame.init()
+screen = pygame.display.set_mode((GX, GY), FLAGS)
+screen.set_alpha(None)