I just start to learn Dynamo. And I have problem with tutorial lesson.
I’ve attached some pictures.
I don’t understand why I have points only on the diagonal, not like in the video. (https://www.youtube.com/watch?v=rjiiy-yQFds)
Video’s name : 5 ComputationalLogic I /// and 2min55sec
Hi Alena, and welcome to the wonderful world of Dynamo! 
One thing you will learn about in the Primer and other tutorials is lacing.
read all about it here: http://dynamoprimer.com/en/06_Designing-with-Lists/6-1_whats-a-list.html
Try to set the lacing of the Point.ByCoordinates node to Cross lacing.
