Ordering list


I am trying to reorder a list to loft 2 some circles to each other and obtain the result on the image below

Capture 01.JPG1570×802 172 KB

I ve tried to use the shiftlist component but without success…
I have still the same outcome illustrated on the image below:

Capture02.JPG1637×836 94.7 KB

Does anyone could help me to reorder my list? the result i would want achieve is to loft the circles in an other direction:

Capture03.JPG1637×836 97.2 KB

please find also attached my grasshoper file
ESPLANADE simplified.gh (55.3 KB)
Thank you very much for your help