save project

snake.py

@@ -53,15 +53,12 @@ while True:
         y -= 30
     else:
         y += 30
+    
+    position.append((x, y))
     if x==apple_x and y==apple_y:
         apple_x=random.randint(0,22)*30
         apple_y=random.randint(0,16)*30
-
-
-
-
-
-    position.append((x, y))
+    else:
         position.pop(0)
     # 将背景图画上去
     screen.blit(background, (0, 0))
@@ -75,4 +72,4 @@ while True:
     screen.blit(food, (apple_x, apple_y))
     # 刷新画面
     pygame.display.update()
-    FPSCLOCK.tick(3)
\ No newline at end of file
+    FPSCLOCK.tick(12)
\ No newline at end of file