diff --git a/my_game.py b/my_game.py
index 1ed78a4..6994646 100644
--- a/my_game.py
+++ b/my_game.py
@@ -19,14 +19,27 @@ hero = [pygame.image.load('hero1.png'),
         pygame.image.load('hero5.png')]                           
 
 index = 0 
-
+y=400
+a="running"
 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:    
+        if event.type==locals.KEYDOWN:
+            if event.key==locals.K_SPACE:
+                a="up"
+    if a =="up":
+        if y>150:
+            y-=5
+        else:
+            a="down" 
+    if a =="down":
+        if y<400:
+            y+=5
+        else:
+            a="running" 
+
     wukong=hero[index]
     index+=1
     if index>=5:
@@ -34,7 +47,7 @@ while True:
     # 将背景图画上去
     screen.blit(background, (0, 0))
     screen.blit(road, (0, 500))
-    screen.blit(wukong, (150, 400))
+    screen.blit(wukong, (150, y))
     # 刷新画面
     pygame.display.update()
     FPS.tick(60)
\ No newline at end of file