Bioluminescence.
She was fascinated by the lamp next to the sofa. She could see the creatures, slowly rotating around some central point. As their bodies moved in they became brighter, while the outer ones dimmed. She wondered what they fed on to create this scintillating glow.
Zentangle drawn on Strathmore Vellum Bristol using a black, Micron pen. Shading done with graphite pencil.