Mix several puddles of different colors on your watercolor palette. I used a round #10 red sable for most of this exercise. A round #4 red sable was used to add smaller variations in the gaps.
A larger brush that holds more paint will allow you to make longer continuous brush strokes.
Fully load or "charge" your watercolor brush with paint and starting at an edge of your paper, start painting a winding line of paint across the page.
Keep the width of the brush stroke as consistent as you can. You can recharge your brush as needed and pick up where you left off.
