... what was wrong with my second question.

Your second question above was an almost exact duplicate of the question here. Such a duplicate can lead, as it has here, to needless duplication of effort on the part of the humble Monks working to answer your questions. Such a duplicate can also make it harder for other Seekers of Wisdom to follow the discussion in the future; one of the important goals of this site is teaching and learning.

I have applied the suggestions and I have modified my code but I can not see an answer to my question in my previous topic.

Unfortunately, your only description of your current problem is "it doesn't work." This is almost useless. Please describe what your code now is and how it does not work. Please see Short, Self Contained, Correct (Compilable), Example for ways to do this briefly and clearly.

... I can not see an answer to my question in my previous topic.

Have you studied this closely? If not, please do. How does it not address your present situation? Please answer there!