Drawn in Adobe Line using the Ink & Slide. In a conversation with another artist here, I realized that I had been worrying over how the limitations of lack of layers made it hard to achieve certain looks, but as I sat down and started doodling this one, I realized that this limitation made it interesting to work within the limitations, which led me to the idea of subtraction...
Line = Addition
Ripple = Subtraction
Thanks for looking!