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

• Put comments in your code. Short code comments help a lot less experienced users understand your lines of code.

• Using GIFs to show results is definitely better than standard still images. Good Work!

• The structure and text of your tutorial are better.

• Thanks for following some suggestions given in the previous tutorial.

Looking forward to your upcoming tutorials.

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