diff --git a/my_Tetris.py b/my_Tetris.py
index f2385ec..b5b6dd6 100644
--- a/my_Tetris.py
+++ b/my_Tetris.py
@@ -7,7 +7,8 @@ grid_size = 20  # 格子大小
 grid_num_width = 15     # 横向格子数量
 grid_num_height = 25      # 纵向格子数量
 FPS = 30
-
+count=0
+states=False
 # 创建窗口
 screen = pygame.display.set_mode((460, 500))
 pygame.display.set_caption("俄罗斯方块")
@@ -43,13 +44,6 @@ cube_colors = [
     (204, 153, 153), (102, 102, 153),(153, 0, 102), 
     (255, 204, 0), (204, 0, 51),(255, 0, 51), (0, 102, 153),
     (153, 0, 51), (204, 255, 102), (255, 153, 0)]
-
-center = [2, 8]     # 第2行第8列
-#current_shape = [(0, -1), (0, 0), (0, 1), (-1, 0)]
-shape=random.choice(shape_list)
-index=random.randint(0,len(shape)-1)
-current_shape=shape[index]
-color=random.choice(cube_colors)
 def check(center):
     for cube in current_shape:
         cube=(cube[0]+center[0],cube[1]+center[1])
@@ -67,11 +61,8 @@ while True:
             elif event.key == locals.K_LEFT:    # 向左
                 center[1] -= 1
                 if check(center)==False:
-                   center[1]+=1
-            elif event.key == locals.K_DOWN:    # 向下
-                center[0] += 1
-                if check(center)==False:
-                   center[0]+=1
+                   center[1]+=1    # 向下
+                
             elif event.key==locals.K_UP:
                 old_index=index
                 index+=1
@@ -81,7 +72,19 @@ while True:
                 if check(center)==False:
                    index=old_index
                    current_shape=shape[index]
-
+    if states=False:
+        states=True
+        center = [2, 8]     # 第2行第8列
+        shape=random.choice(shape_list)
+        index=random.randint(0,len(shape)-1)
+        current_shape=shape[index]
+        color=random.choice(cube_colors)
+    count+=1
+    if count%FPS==0:
+       center[0] += 1
+       if check(center)==False:
+          center[0]+=1
+          states=False
     # 将背景图画上去
     screen.blit(background, (0, 0))
     # 计算出所有小方块的行、列位置