Night Vision

Dark swirls on purple grey
Dance across my vision today.

With closed or open eyes I see
This pattern that envelopes me.

T'is not a poem of darkness & woe
But my own personal light show.

{Lay in a darkened - but not pitch black - room and stare unfocused at the ceiling. Do you see purple and lime-yellow swirls? I've seen them as long as I can remember & figure its just an artifact of our optic sensory apparati and nerves}