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Collections are a way for you to organize kata so that you can create your own training routines. Every collection you create is public and automatically sharable with other warriors. After you have added a few kata to a collection you and others can train on the kata contained within the collection.
Get started now by creating a new collection.
Hi,
If you're interested in authoring kata, you should begin with reading the entire documentation about it: https://docs.codewars.com/authoring/guidelines/kata
In addition to what was already pointed below:
Cheers
You need to write actual tests and proper initial code for the kata.