Perpendicular planes on Tweened curves (Pufferfish)


I am wondering how I can make the planes perpendicular on the divisions on multiple tweened curves. I have listed one of the the curves, as i only need squares to be put on this side

The planes seems to be perpendicular on the first shape, but as the shape evolves the planes tend to have the same the same direction as on the first shape, is it possible to make them all perpendicular to each curve?

Best regards, (15.9 KB) tween_curve_2.3dm (84.1 KB) (19.4 KB)

Thank you so much! This is exactly what i was looking for!

Best regards