Ingredients: take one eighteenth century church, some volunteers who have not painted before, fifty+ square metres of canvas, and a lot of paint.
Marinate over a couple of weekends in church halls and unused gallery areas, gradually adding layers of primer and then paint.
Sew on straps and attach to balcony railings.
Light candles (after applying flame retardant).
Why? It's for a new informal worship evening in a very traditional church - we wanted the place to look very different for the night.