Thank you for your contribution @duski.harahap.
After reviewing your tutorial we suggest the following points:

• We suggest you enter comments in your code. It is important for the reader to understand well the code that you put in your tutorial.

We really enjoyed the tutorial you developed. We are waiting for more of these tutorials.

Your contribution has been evaluated according to Utopian policies and guidelines, as well as a predefined set of questions pertaining to the category.

To view those questions and the relevant answers related to your post, click here.

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