Creating a parametric pavilion

Hi guys, 

Im trying to recreate this type of pavilion in grasshopper:

Ive tried to start by creating the polygon and arraying it along a curve. however, I dont know how to rotate it. 

Other than the rotation i would also like to change the density at the endpoints of the line...i.e closer to each other and then more spaced out...

here is what i have:

Thank you so much!

p.S.  if there is a link that would help me in this i would really appreciate it!