How to control direction of rectangle made by rec2pt

Hi, I’m grasshopper beginner.
I try to make squares by rec2pt component.
The first try succeeded but the second try made it rectangles like a photo.
What does the direction of this component rely on?

the direction relies on a Plane, sides of the rectangle will be parallel to X and Y axis of that plane


I completely understand how to control direction!
Thank you so much!

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