As she started sketching, it seemed as if the pattern already existed in her mind and that she was simply dumping the image onto that piece of paper. She was so focused and did not break her concentration until her drawing was complete.
It's impossible to say exactly what the thought process was for the color scheme chosen. Interestingly though, she adopted a very different process for completing the pattern that I do. She chose her colors before she created the forms.
She started with blue to capture the surface of the water. The fish and the ocean in which they are swimming are colored with various shades of red and orange. Their movement was captured through the "crazy lines" that were drawn in all directions. She added some seaweed, using both green and orange, in case the fish became hungry. Moreover, since she knew that there were probably some stones somewhere in the ocean, she included them using a deep purple. Finally, she added some pink, because pink is her favorite color and because "pink always makes people smile".