diff --git "a/ch07-\346\212\212\351\274\240\346\240\207\345\275\223\347\224\273\347\254\224/7.draw_circle_rectangle.py" "b/ch07-\346\212\212\351\274\240\346\240\207\345\275\223\347\224\273\347\254\224/7.draw_circle_rectangle.py"
index b5c672c4..68e927bf 100755
--- "a/ch07-\346\212\212\351\274\240\346\240\207\345\275\223\347\224\273\347\254\224/7.draw_circle_rectangle.py"
+++ "b/ch07-\346\212\212\351\274\240\346\240\207\345\275\223\347\224\273\347\254\224/7.draw_circle_rectangle.py"
@@ -48,3 +48,5 @@ def draw_circle(event, x, y, flags, param):
         mode = not mode
     elif k == ord("q"):
         break
+cv.waitKey()
+cv.destroyAllWindows()