Western Flag (Spindletop, Texas) 2017 depicts the site of the 'Lucas Gusher' - the world's first major oil find - in Spindletop, Texas in 1901, now barren and exhausted. John Gerrard has recreated the site as a digital simulation and placed at its centre a flagpole bearing a flag of perpetually-renewing pressurised black smoke. The computer generated Spindletop runs in exact parallel with the real site in Texas throughout the year: the sun rising at the appropriate times and the days getting longer and shorter according to the seasons. The simulation is non-durational (having no beginning or end) and is run live by software that is calculating each frame of the animation in real time as it is needed.