Seating positioning stadion

Hello people I need your help,

I have no experience in Grasshopper, but because of time pressure I should use it for my stadion.
I need to position the seat, i've already done it manually, but after changes I need all new. (about 15.000 seats)

I have a lot of lines and have to divide them between start and endpoint evenly. Lines (Different lengths X) should have as many subdivisions as possible but not less than For example 51 cm (. And the block X should be copied to every point.

I don't know how i can do it. I hope someone can help me, it would be a great time-saving

Many Thanks Andy