Curvy lines patterns

Thank you, Helen, for this great class.
I enjoyed it very much :-)
It's always a pleasure to play with you.
Please find my results below.
Class 1
Beautiful with the gradient filling
and also :
Simple - plain colors and recolored
Class 2
My prefered pattern : it's so graceful and I love the under/above look
The 2 other ones:
Simple and recolored
Class 3
The tip with the small rectangle is really useful : it's hard to connect perfectly the 2 shapes at the beginning ...