How to make the circle shape moved by series in a smooth way?

[黃議德]

Hi ,guys .
I have a practice is to make a shape like this pics.

But I always can’t make the fist one connect with the final one in a smooth way.

I want to make this is more smooth with the blue line.

Is there have any way to fix the problem?
Can anyone helps me for this， Thanks

20220611_Prcatice.gh (14.6 KB)

[Gijs (Gijs de Zwart)]

this is one way to do it, cut your series in half and reverse the list and merge the two together
20220611_Practice2.gh (12.4 KB)

[黃議德]

Thanks, Gijs.
But here the connect place will looks sharp.

Is possible to make it more like wave?

[Gijs (Gijs de Zwart)]

Then not use the graph mapper but use a sin or cos function for that, then you get fluent waves:
20220611_Practice3.gh (12.2 KB)

[黃議德]

This way is pretty good, thanks a lot.