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diff --git a/bg.png b/bg.png
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diff --git a/my_Tetris.py b/my_Tetris.py
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+++ b/my_Tetris.py
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+import pygame
+from pygame import locals
+import random
+
+pygame.init()   # 初始化
+score = 0
+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
+states=False
+count=0
+
+# 创建窗口
+screen = pygame.display.set_mode((460, 500))
+pygame.display.set_caption("俄罗斯方块")
+clock = pygame.time.Clock()  # pygame时钟，控制游戏速度（帧数）
+# 载入素材
+background = pygame.image.load('bg.png')
+font = pygame.font.Font('STKAITI.TTF', 60)  # 字体
+
+# 俄罗斯方块所有形状
+O = [[(0, 0), (0, 1), (1, 0), (1, 1)]]
+I = [[(0, -1), (0, 0), (0, 1), (0, 2)],
+     [(-1, 0), (0, 0), (1, 0), (2, 0)]]
+Z = [[(0, -1), (0, 0), (1, 0), (1, 1)],
+     [(-1, 0), (0, 0), (0, -1), (1, -1)]]
+S = [[(-1, 0), (0, 0), (0, 1), (1, 1)],
+     [(1, -1), (1, 0), (0, 0), (0, 1)]]
+T = [[(0, -1), (0, 0), (0, 1), (-1, 0)],
+     [(-1, 0), (0, 0), (1, 0), (0, 1)],
+     [(0, -1), (0, 0), (0, 1), (1, 0)],
+     [(-1, 0), (0, 0), (1, 0), (0, -1)]]
+J = [[(-1, 0), (0, 0), (1, 0), (1, -1)],
+     [(0, -1), (0, 0), (0, 1), (-1, -1)],
+     [(-1, 0), (0, 0), (1, 0), (-1, 1)],
+     [(0, -1), (0, 0), (0, 1), (1, 1)]]
+L = [[(-1, 0), (0, 0), (1, 0), (1, 1)],
+     [(0, -1), (0, 0), (0, 1), (1, -1)],
+     [(-1, 0), (0, 0), (1, 0), (-1, -1)],
+     [(0, -1), (0, 0), (0, 1), (-1, 1)]]
+shape_list = [I, J, L, O, S, T, Z]  # 7种类型俄罗斯方块
+
+# 一些RGB颜色
+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)]
+
+
+def check(center):
+    for cube in current_shape:
+        cube=(cube[0]+center[0],cube[1]+center[1])
+        if cube[0]<1 or cube[1]<1 or cube[0]>grid_num_height or cube[1]>grid_num_width:
+            return False
+
+while True:
+    for event in pygame.event.get():
+        if event.type == locals.QUIT:
+            exit()
+        if event.type == locals.KEYDOWN:
+            if event.key == locals.K_RIGHT:
+                center[1] += 1
+                if check(center)==False:
+                    center[1]-=1
+            elif event.key == locals.K_LEFT:    
+                center[1] -= 1
+                if check(center)==False:
+                    center[1]+=1
+            elif event.key == locals.K_DOWN:    
+                center[0] += 1
+                if check(center)==False:
+                    center[1]-=1
+
+            elif event.key==locals.K_UP:
+                old_index=index
+                index+=1
+                if index>=len(shape):
+                    index=0
+                current_shape=shape[index]
+                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
+    current_pos = []
+    for cube in current_shape:
+        pos = (cube[0] + center[0], cube[1] + center[1])
+        current_pos.append(pos)
+    # 取出所有小方块的行、列位置，计算坐标，绘制俄罗斯方块
+    for cube in current_pos:
+        pygame.draw.rect(screen, color,
+                    (cube[1] * 20-20, cube[0] * 20-20, 20, 20), 0)
+        pygame.draw.rect(screen, (255, 255, 255), 
+                        (cube[1] * 20-20, cube[0] * 20-20, 20, 20), 1)
+    # 得分
+    text_surface = font.render(str(score), True, (0, 0, 0))
+    screen.blit(text_surface, (350,70))
+    # 刷新画面
+    pygame.display.update()
+    clock.tick(FPS)