save project

my_music.py

 import pygame
 from pygame import locals
-SY=0
+SY=0.2
 pygame.init()   # 初始化
 # 创建窗口
 screen = pygame.display.set_mode((640, 480))
@@ -17,7 +17,11 @@ while True:
     for event in pygame.event.get():
         if event.type == locals.QUIT:
             exit()
-    if SY != 0 and KEYDONG
+    if event.type == locals.KEYDOWN:
+        if event.key == locals.K_UP and SY != 1:
+            SY=SY+0.1
+        if event.key == locals.K_DOWN and SY != 0:
+            SY=SY-0.1
     if pygame.mixer.music.get_busy() == False:
         pygame.mixer.music.play()
     # 绘制画面