save project

snake.py

@@ -27,7 +27,8 @@ snake_head = right
 apple_y = 300
 apple_x = 360
 score = 0
-tick = 0
+speed = 3
+
 while True:
     for event in pygame.event.get():
         if event.type == locals.QUIT:
@@ -84,6 +85,11 @@ while True:
     info = "Score:" + str(score)
     text = my_font.render(info,True,(255,255,0))
     screen.blit(text,(540,10))
+    #jiasu
+    if score > 2 and score <= 4 and speed == 3:
+        speed += 1
+    elif score > 4 and score <= 9 and speed == 4:
+        speed += 1
     # 刷新画面
     pygame.display.update()
-    FPSCLOCK.tick(4)
\ No newline at end of file
+    FPSCLOCK.tick(speed)
\ No newline at end of file