save project

my_Tetris.py

@@ -54,7 +54,8 @@ def check(center):
         if cube[0] < 1 or cube[1] < 1 or cube[0] > grid_num_height \
                 or cube[1] >grid_num_width:
             return False
-
+        if num_list[cube[0]-1][cube[1]-1] != 0:
+            return False
 while True:
     for event in pygame.event.get():
         if event.type == locals.QUIT: