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

• In your next tutorial put comments in the code sections. Users with less experience have more difficulty interpreting code and a brief explanation in more complicated code lines helps always.

• Use only the third person in the text of your tutorial.

• Try to improve the structure of your tutorial.

Thank you for your work in developing this tutorial.
Looking forward to your upcoming tutorials.

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