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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.
It seems to me that the picture on the left preceeds the picture on the right; that the three arrows are suggesting you move the three lines inwards, forming the second scenario.
I found this online Ignore the left one, I am not sure what it means.
Simple
forloop is OK, the only question is: how far to loop? :)Please see if this explains things: https://github.com/codewars/codewars.com/wiki/Troubleshooting-your-solution#when-i-run-tests-everything-passes-but-when-i-hit-attempt-tests-fail