save project

my_game.py

@@ -81,11 +81,10 @@ while True:
         num=random.randint(0,50) 
         if num>20:
             aa=Block(bush,cacti,stone)
-            block_list
-    aa.rect.x -= 8
-
- 
-    screen.blit(aa.image, (aa.rect.x, aa.rect.y)) 
+            block_list.add(aa)
+    for aa in block_list:
+        aa.rect.x -= 8
+        screen.blit(aa.image, (aa.rect.x, aa.rect.y)) 
     # 刷新画面
     pygame.display.update()
     FPS.tick(60)
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