1. Use #2 pencil.
Draw 9+ vertical waves. Alter space and curves
3. Use thin Sharpie.
Draw upward curves above the middle wave.
Draw downward curves below the middle wave.
Every next curve starts at a previous line.
Alter the distance between the curves.
8. Add another analogous color or repeat the first one.
9. Use different colors for the next section.
This is how you color:
shade lightly the entire shape with a color of your choice