one of the patterns is based on a giant carniverous plant; the other is a painting of hospital trolley wheels.
I spent a long time in hospital and I drew the wheels on the medicine cart over and over again. They were very interesting - their centre of gravity is in an unexpected place and they are such a wierd wobbly shape. Plus medicine time is the highlight and dread of the hospital day, so there is such emotion attached to them and their squeaky progress up the ward towards you.