diff --git a/my_game.py b/my_game.py
index 1b3648b..92c0470 100644
--- a/my_game.py
+++ b/my_game.py
@@ -17,19 +17,33 @@ hero=[pygame.image.load('hero1.png'),
     pygame.image.load('hero4.png'),
     pygame.image.load('hero5.png')]
 index = 0 
-
+j='running'
+y=400
 while True:
     for event in pygame.event.get():
         if event.type == locals.QUIT:
             # 接收到退出事件后退出程序
             exit()
+        if event.type==locals.KEYDOWN:
+            if event.key==locals.K_SPACE:
+                j='up'
+    if j=='up':
+        if y>150:
+            y-=5
+        else:
+            j='down'
+    if j=='down':
+        if y<400:
+            y+=5
+        else:
+            j='running'
     if index>=4:
         index=0
     index+=1
     # 将背景图画上去
     screen.blit(background, (0, 0))
     screen.blit(road, (0, 500))
-    screen.blit(hero[index], (150, 400))
+    screen.blit(hero[index], (150, y))
     # 刷新画面
     pygame.display.update()
     FPS.tick(60)
\ No newline at end of file