One of the long-held dreams of amateur inventors – like building the proverbial ‘better mousetrap’ – is to come up with a way to create a machine that powers itself, without ever slowing down or stopping. The quest for Perpetual Motion isn’t only limited to devices, though – it’s also used as a musical concept. Composers such as Niccolò Paganini and Johann Strauss II have works that seem to go on and on without ever stopping.