save project

my_Tetris.py

@@ -68,9 +68,11 @@ while True:
                 if check(center)==False:
                     center[1]+=1
 
-            elif event.key == locals.K_DOWN:    # 向下
-                if center[0] < 25:
-                    center[0] += 1
+            elif event.key == locals.K_DOWN:  
+                center[0] += 1   # 向下
+                if check(center)==False:
+                    center[0] -= 1
+                   
 
     # 将背景图画上去
     screen.blit(background, (0, 0))