I love the rainbow colors and the fact that the swirls are sort of in a DNA shape.
My strokes turned out more angular than curved, though:
The designs on my ring and middle finger are also different because I had inititally left my ring finger plain.
It is a gray scattered holo.
From pointer to pinky: Base colors are seascape by Lilypad Lacquer, As Good as Gold by Lilypad Lacquer, and Dance Legend #46, and Seascape again. On the pointer finger I also used Leather & Lace by Colors by Llarowe toadd more holo.
I used a few different polishes on the design on my middle and ring fingers (mainly Jades since the thin brushes are good for a design like this)- if you have questions about any of them, just let me know)
Here are the other lovely ladies who did this challenge: