A dice throw led to a science dictionary from which my collaborator (with an interest in astronomy) chose 'red shift'. This is otherwise known as the Doppler Effect and refers to a difference in the frequency of light waves (as well as sound) which occurs if the source of the light is travelling away from the observer. Sources travelling towards the observer have their light frequency increased or 'blue shifted'. The piece is a kind of 'What if?' thought experiment speculating on how the Doppler effect might work with water waves. The video footage of the sea was edited in a cycle so that as the waves speeded up they became more blue and then slowed down becoming more red. The installation involved a split screen setup with a translucent black screen closer to the projector making and immersive space through which the audience could move and their shadows became part of the work.